Certified Telecommunications Executive (CTE) — Questions and Answers

Question 1: A CTE is structuring a sale-leaseback transaction for cell tower assets. What is the primary financial motivation for this transaction type?

To increase the number of towers owned outright
To avoid property tax on tower infrastructure
To transfer tower maintenance responsibility to regulators
To convert tower assets into immediate cash while retaining the right to use them, improving liquidity and unlocking capital for network investment (Correct answer)

Correct answer: To convert tower assets into immediate cash while retaining the right to use them, improving liquidity and unlocking capital for network investment

A sale-leaseback converts illiquid tower assets into cash by selling them to a tower company (like American Tower or Crown Castle) and then leasing them back, freeing capital for spectrum or network upgrades.

Question 2: A US telecom executive must manage foreign exchange risk on equipment purchases denominated in euros. Which financial instrument is commonly used to hedge this currency exposure?

Forward exchange contract (Correct answer)
Credit default swap
Interest rate swap
Equity put option

Correct answer: Forward exchange contract

A forward exchange contract locks in a predetermined exchange rate for a future date, eliminating the uncertainty of currency fluctuations on large equipment purchases denominated in foreign currencies.

Question 3: A US telecom CFO presents a project with an NPV (Net Present Value) of $0. What does this indicate about the investment?

The project's discounted cash inflows exactly equal its initial investment cost, earning exactly the required rate of return (Correct answer)
The project should be rejected outright
The project has no risk
The project will generate no revenue

Correct answer: The project's discounted cash inflows exactly equal its initial investment cost, earning exactly the required rate of return

An NPV of $0 means the investment earns exactly the discount rate (hurdle rate) used in the calculation — it neither creates nor destroys value beyond the required return.

Question 4: A telecom enterprise account team uses a 'Customer Health Score.' Which combination of inputs is most relevant to this score?

Employee headcount and office location
Marketing campaign engagement and social media follows
Sales rep call frequency and meeting notes
Product adoption rate, support ticket volume, and renewal likelihood (Correct answer)

Correct answer: Product adoption rate, support ticket volume, and renewal likelihood

Customer Health Scores combine usage signals, support demand, and renewal probability to give account teams an early warning of at-risk customers.

Question 5: A telecom company wants to migrate its BSS/OSS to the cloud while keeping core network functions on-premises. Which cloud model best describes this architecture?

Edge cloud
Private cloud
Multi-cloud
Hybrid cloud (Correct answer)

Correct answer: Hybrid cloud

Hybrid cloud combines on-premises (private) infrastructure with public cloud resources, allowing selective workload placement.

Question 6: What is a digital twin in the context of telecommunications network management?

A duplicate SIM card assigned to a subscriber
A virtual replica of a physical network used for simulation and testing (Correct answer)
A backup physical network running in parallel
A redundant fiber path for failover

Correct answer: A virtual replica of a physical network used for simulation and testing

A digital twin is a virtual model of a physical network that mirrors real-time conditions, enabling operators to simulate changes, test configurations, and predict outcomes without impacting production.

Question 7: Why is vision important in strategic leadership?

To focus on technical execution only.
To complicate planning.
To unify the organization around long-term goals (Correct answer)
To replace all existing processes.

Correct answer: To unify the organization around long-term goals

A clear vision in strategic leadership provides a compelling picture of the desired future state for the organization. It inspires and motivates employees, giving them a shared purpose and direction. This unified understanding of long-term goals helps align individual efforts and departmental objectives, fostering cohesion and driving the entire organization forward towards common objectives.

Question 8: In a telecom billing database, which isolation level prevents dirty reads while allowing non-repeatable reads?

READ COMMITTED (Correct answer)
REPEATABLE READ
READ UNCOMMITTED
SERIALIZABLE

Correct answer: READ COMMITTED

READ COMMITTED prevents dirty reads by only reading committed data, but allows non-repeatable reads if another transaction commits between reads.

Question 9: Which designation under the FCC's numbering rules identifies a North American Numbering Plan (NANP) area code that has been designated for overlay or relief?

NXX code
OCN code
LATA boundary code
NPA code (Correct answer)

Correct answer: NPA code

NPA (Numbering Plan Area) codes, commonly called area codes, are the three-digit codes managed under the NANP that may be overlaid or split for relief.

Question 10: An enterprise customer reports that calls originating from their PBX are being fraudulently redirected to international premium-rate numbers. This is best described as:

Call spoofing
Toll fraud / PBX hacking (Correct answer)
Vishing
War dialing

Correct answer: Toll fraud / PBX hacking

Toll fraud via PBX hacking involves unauthorized access to a PBX system to make calls to premium-rate or international numbers at the victim's expense.

Question 11: When building a telecom customer lifetime value (CLV) model, which input variable is typically the strongest predictor?

Customer's geographic ZIP code
Number of calls to customer support
Historical payment behavior and plan tenure (Correct answer)
Device brand preference

Correct answer: Historical payment behavior and plan tenure

Consistent payment history and long tenure directly indicate future revenue reliability and the customer's value horizon.

Question 12: A carrier is experiencing chronic fiber cuts along a specific route. Which protection scheme provides sub-50ms restoration on an optical ring?

1+1 APS (Automatic Protection Switching) (Correct answer)
Manual failover via NOC ticketing
OSPF rerouting
Static route redistribution

Correct answer: 1+1 APS (Automatic Protection Switching)

1+1 APS in SONET/SDH rings provides automatic protection switching in under 50 milliseconds by simultaneously transmitting on both working and protect paths.

Question 13: What is a dashboard in CTE reporting?

A visual display of key metrics for at-a-glance performance monitoring (Correct answer)
A written monthly report
A physical control panel
An IT-only tool

Correct answer: A visual display of key metrics for at-a-glance performance monitoring

A dashboard consolidates important metrics and trends visually for quick assessment of performance status.

Question 14: A telecom executive reviews a network diagram showing traffic being routed through inspection engines before reaching its destination. What security device architecture is this?

Next-Generation Firewall (NGFW) inline deployment (Correct answer)
Passive IDS deployment
Honeypot placement
Sniffer tap configuration

Correct answer: Next-Generation Firewall (NGFW) inline deployment

An inline NGFW intercepts and inspects all traffic before forwarding it, enabling deep packet inspection and policy enforcement.

Question 15: A regional telecom company wants to enter the enterprise IoT market. Which growth strategy from Ansoff's Matrix does this represent?

Product Development
Diversification (Correct answer)
Market Development
Market Penetration

Correct answer: Diversification

Entering the enterprise IoT market with new products for new customers represents Diversification, the highest-risk quadrant of Ansoff's Matrix.

Question 16: A network executive wants to implement intent-based networking (IBN). What is the core principle of IBN?

Operators express desired outcomes and the system automatically translates them into network configurations (Correct answer)
Deploying networks exclusively in public cloud environments
Using AI to replace all human network engineers
Manually configuring each device using CLI commands

Correct answer: Operators express desired outcomes and the system automatically translates them into network configurations

Intent-based networking allows operators to define high-level business intent, and the system automatically translates and enforces that intent across the network.

Question 17: A telecom operator uses threat intelligence feeds to identify indicators of compromise (IOCs). Which type of IOC provides the highest fidelity signal with the longest useful lifespan?

Domain names used in phishing campaigns
MD5 hashes of malware files
Tactics, Techniques, and Procedures (TTPs) (Correct answer)
IP addresses of known malicious hosts

Correct answer: Tactics, Techniques, and Procedures (TTPs)

TTPs describe adversary behavior patterns that are expensive for attackers to change, giving defenders long-lasting, high-confidence detection capabilities.

Question 18: What is the purpose of a zero-based budgeting (ZBB) approach when a US telecom executive is tasked with restructuring operational costs?

Carrying forward the prior year's budget with a 3% inflation adjustment
Eliminating all capital projects for one fiscal year
Building every budget line from zero each cycle, requiring each expense to be justified from scratch (Correct answer)
Setting budget targets based solely on competitor benchmarks

Correct answer: Building every budget line from zero each cycle, requiring each expense to be justified from scratch

Zero-based budgeting requires every department to justify all expenditures from scratch each budget cycle rather than incrementally adjusting prior-year figures, forcing scrutiny of every cost.

Question 19: In a US carrier's financial model, what does Average Revenue Per User (ARPU) measure and why is it important?

The average cost to acquire a new customer
The total revenue divided by number of employees
The revenue generated per subscriber, used to track monetization trends and forecast future revenue (Correct answer)
The total capital invested per cell site

Correct answer: The revenue generated per subscriber, used to track monetization trends and forecast future revenue

ARPU measures revenue per subscriber and is a key KPI for tracking subscriber monetization trends, pricing strategy effectiveness, and forecasting total revenue as subscriber counts change.

Question 20: Under CPNI (Customer Proprietary Network Information) rules, carriers must notify the FCC within how many business days of discovering a data breach?

30 business days
7 business days (Correct answer)
5 business days
10 business days

Correct answer: 7 business days

FCC rules require carriers to notify the FBI and Secret Service within 7 business days of reasonably determining a CPNI breach has occurred.

Question 21: A telecom operator uses Infrastructure as Code (IaC) for its cloud deployments. What is the primary benefit of this approach?

It eliminates the need for cloud engineers
It enables reproducible, version-controlled, and automated infrastructure provisioning (Correct answer)
It provides real-time network monitoring dashboards
It reduces cloud billing by automatically rightsizing instances

Correct answer: It enables reproducible, version-controlled, and automated infrastructure provisioning

IaC codifies infrastructure configuration, enabling version control, peer review, automated testing, and consistent repeatable deployments.

Question 22: A regional telecom measures its Customer Effort Score (CES). Which scenario would MOST likely increase CES (worse score)?

Requiring customers to repeat account information to multiple agents (Correct answer)
Proactively notifying customers of outages via SMS
Resolving a billing dispute in a single call
Offering 24/7 self-service portal access

Correct answer: Requiring customers to repeat account information to multiple agents

Forcing customers to repeat information across agents creates unnecessary friction, directly increasing perceived effort and worsening CES.

Question 23: In a telecom risk register, what does 'residual risk' represent after security controls are applied?

The original risk before any controls were implemented
The risk that remains after existing controls are accounted for (Correct answer)
The risk transferred to a third-party insurer
The projected risk level five years in the future

Correct answer: The risk that remains after existing controls are accounted for

Residual risk is the remaining exposure after all implemented controls have reduced the inherent risk to an acceptable level.

Question 24: What is the risk of non-compliance in telecommunications?

Reduced need for documentation.
Fines, lawsuits, and reputational damage (Correct answer)
Improved customer satisfaction.
Higher bandwidth performance.

Correct answer: Fines, lawsuits, and reputational damage

Non-compliance in telecommunications carries significant risks, including substantial financial fines imposed by regulatory bodies. Companies also face potential lawsuits from affected parties and severe reputational damage, which can erode customer trust and negatively impact business stability and growth.

Question 25: In a 5G deployment, what is the primary function of the fronthaul network segment?

Connecting the Radio Unit (RU) to the Distributed Unit (DU) in a disaggregated RAN architecture (Correct answer)
Connecting end-user devices to base stations
Providing internet peering between autonomous systems
Interconnecting core network functions in the data center

Correct answer: Connecting the Radio Unit (RU) to the Distributed Unit (DU) in a disaggregated RAN architecture

Fronthaul connects the Radio Unit at the antenna site to the Distributed Unit (baseband processing), requiring ultra-low latency and precise timing in 5G Open RAN architectures.

Question 26: A telecom's strategic plan calls for geographic expansion into three new markets. Which tool is most appropriate for prioritizing which markets to enter first?

PEST Analysis
SWOT Analysis
GE-McKinsey Nine-Box Matrix (Correct answer)
Value Chain Analysis

Correct answer: GE-McKinsey Nine-Box Matrix

The GE-McKinsey Nine-Box Matrix evaluates market attractiveness against competitive strength, enabling prioritization of investment opportunities across multiple markets.

Question 27: During an M&A integration, a telecom executive discovers significant cultural differences between the two organizations. According to change management theory, what is the first critical step?

Immediately standardize all processes to the acquiring company's model
Replace the acquired company's leadership team entirely
Diagnose and acknowledge cultural differences before designing integration plans (Correct answer)
Delay integration until all regulatory approvals are finalized

Correct answer: Diagnose and acknowledge cultural differences before designing integration plans

Diagnosing cultural gaps before integration planning prevents costly misalignments and resistance that can destroy merger value.

Question 28: Which technology enables multiple virtual private networks to share a common MPLS backbone while maintaining traffic isolation?

ATM PVCs
ISDN B-channels
L3VPN using BGP/MPLS (Correct answer)
Frame Relay DLCIs

Correct answer: L3VPN using BGP/MPLS

BGP/MPLS Layer 3 VPNs (RFC 4364) allow multiple customer VPNs to share MPLS infrastructure with full routing and traffic isolation.

Question 29: An executive applies 'first-principles thinking' to redesign a telecom's billing system. What does this approach involve?

Deconstructing the system to its fundamental requirements and rebuilding from scratch (Correct answer)
Outsourcing the system redesign to a consulting firm
Benchmarking against the industry's best billing platforms
Iterating on the existing system using lean methodology

Correct answer: Deconstructing the system to its fundamental requirements and rebuilding from scratch

First-principles thinking breaks down a problem to its most basic truths and builds solutions from the ground up, bypassing assumptions embedded in existing systems.

Question 30: What is change management in CTE technology?

Replacing all systems at once
A structured process for evaluating and implementing changes safely (Correct answer)
Monthly password changes
Making changes immediately without review

Correct answer: A structured process for evaluating and implementing changes safely

IT change management ensures changes are evaluated, approved, tested, and implemented in a controlled manner.

Question 31: What does FCC stand for in U.S. telecommunications regulation?

Frequency Communication Control
Fiber Communication Company
Federal Cable Consortium
Federal Communications Commission (Correct answer)

Correct answer: Federal Communications Commission

The FCC, or Federal Communications Commission, is the independent agency of the United States government responsible for regulating interstate and international communications. It oversees various aspects of telecommunications, including radio, television, wire, satellite, and cable, to ensure fair competition and protect consumer interests.

Question 32: Under the FCC's hearing aid compatibility (HAC) rules for wireless handsets, what percentage of a carrier's handset models must meet the M3 or better rating for acoustic coupling?

50%
33%
85%
66% (Correct answer)

Correct answer: 66%

FCC HAC rules require that at least two-thirds (approximately 66%) of a carrier's handset models offered meet the M3 or better acoustic coupling rating.

Question 33: What standard governs the synchronization of packet networks used in 5G and carrier Ethernet deployments?

ITU-T G.652
IEEE 802.11ax
ANSI T1.101
IEEE 1588v2 (Precision Time Protocol) (Correct answer)

Correct answer: IEEE 1588v2 (Precision Time Protocol)

IEEE 1588v2 (PTP) provides sub-microsecond time synchronization over packet networks, essential for 5G RAN timing and carrier Ethernet phase synchronization.

Question 34: Which contact channel typically achieves the highest First Contact Resolution (FCR) rate in telecom customer service?

Live chat with integrated CRM access (Correct answer)
Outbound proactive notification
Social media support
Email support

Correct answer: Live chat with integrated CRM access

Live chat combined with CRM access gives agents real-time account data to resolve issues during the interaction without callbacks or transfers.

Question 35: Which SQL command is used to reclaim storage and update statistics after a large batch delete of expired CDR records in a telecom database?

VACUUM or REORGANIZE INDEX (database-specific) (Correct answer)
TRUNCATE TABLE
DROP TABLE
ALTER TABLE

Correct answer: VACUUM or REORGANIZE INDEX (database-specific)

VACUUM (PostgreSQL) or REORGANIZE INDEX (SQL Server) reclaims fragmented space and updates statistics after large data deletions.

Question 36: Which contract clause protects a telecommunications buyer if a vendor is acquired by a competitor during the contract term?

Benchmarking clause
Force majeure clause
Change of control clause (Correct answer)
Most favored nation (MFN) clause

Correct answer: Change of control clause

A change of control clause gives the buyer termination rights or renegotiation options if the vendor is sold, merged, or undergoes a material ownership change that may affect service quality or competitive sensitivity.

Question 37: A telecommunications executive implementing a vendor tiering strategy would classify a provider of a single non-critical circuit as which tier?

Tier 0 — Critical infrastructure partner with board-level oversight
Tier 1 — Strategic partner requiring executive-level governance
Tier 2 — Preferred partner requiring quarterly executive business reviews
Tier 3 or Preferred — Tactical supplier managed through standard procurement and account management (Correct answer)

Correct answer: Tier 3 or Preferred — Tactical supplier managed through standard procurement and account management

Vendor tiering allocates management intensity proportional to criticality and spend; non-critical, low-volume suppliers are managed through standard procurement channels rather than resource-intensive executive governance models.

Question 38: A CTE must present the financial justification for a $200M fiber-to-the-home (FTTH) buildout. Which metric would best demonstrate long-term project viability to the board?

Gross margin in year one
Payback period only
Total headcount required for installation
Internal Rate of Return (IRR) compared to the company's hurdle rate (Correct answer)

Correct answer: Internal Rate of Return (IRR) compared to the company's hurdle rate

IRR calculates the discount rate at which the project's NPV equals zero; if IRR exceeds the company's hurdle rate (cost of capital), the project creates shareholder value.

Question 39: Which financial metric best measures how efficiently a telecom company converts revenue into profit, commonly used to compare carriers of different sizes?

Total revenue
Gross debt
EBITDA margin (Correct answer)
Customer acquisition cost

Correct answer: EBITDA margin

EBITDA margin (EBITDA divided by revenue) measures operational profitability before non-cash items and financing costs, enabling apples-to-apples comparison across carriers regardless of capital structure.

Question 40: What is backup and disaster recovery for in CTE technology?

Satisfying vendors
Ensuring data restoration and operations resumption after failures (Correct answer)
Creating copies for sharing
Freeing storage space

Correct answer: Ensuring data restoration and operations resumption after failures

These plans ensure critical data and systems can be restored within acceptable timeframes after disruptions.

Question 41: A telecom company discovers that its billing software has a defect that surfaces only when invoices exceed 10,000 line items. This type of bug is best caught during which SDLC phase?

Requirements Review
System Integration Testing (Correct answer)
Deployment
Unit Testing

Correct answer: System Integration Testing

System Integration Testing validates end-to-end behavior under realistic data volumes, catching edge cases that unit tests miss.

Question 42: In US telecom financial reporting, how are spectrum licenses typically treated on the balance sheet under US GAAP?

Recorded as intangible assets and evaluated annually for impairment (not amortized for indefinite-lived licenses) (Correct answer)
Expensed immediately in the year of purchase
Recorded as current liabilities
Classified as inventory

Correct answer: Recorded as intangible assets and evaluated annually for impairment (not amortized for indefinite-lived licenses)

Under US GAAP, spectrum licenses with indefinite useful lives are recorded as intangible assets and tested annually for impairment rather than systematically amortized.

Question 43: A telecommunications company is designing a network that must survive the loss of an entire geographic region. Which design principle should be prioritized?

Deploying additional edge caches
Load balancing across servers in a single data center
Increasing bandwidth capacity at the primary site
Geographic redundancy with active-active or active-passive failover (Correct answer)

Correct answer: Geographic redundancy with active-active or active-passive failover

Geographic redundancy ensures that regional disasters do not cause a total outage, using active-active or active-passive configurations across dispersed sites.

Question 44: Which FCC rule category specifically governs the provision of telecommunications relay services (TRS) for individuals with hearing or speech disabilities?

47 CFR Part 6
47 CFR Part 90
47 CFR Part 64 Subpart F (Correct answer)
47 CFR Part 80

Correct answer: 47 CFR Part 64 Subpart F

47 CFR Part 64 Subpart F contains the FCC's TRS rules, implementing Section 225 of the Communications Act for relay services.

Question 45: A telecom OSS project uses story points to estimate effort in two-week sprints. This estimation practice is associated with which SDLC methodology?

Waterfall
Scrum (Correct answer)
CMMI
PRINCE2

Correct answer: Scrum

Scrum uses story points and time-boxed sprints as core planning and estimation mechanisms for iterative development.

Question 46: What does RTO (Recovery Time Objective) measure in a telecom database disaster recovery plan?

The maximum amount of data loss acceptable measured in time
The frequency of database backups
The maximum acceptable time to restore database operations after a failure (Correct answer)
The number of backup copies retained

Correct answer: The maximum acceptable time to restore database operations after a failure

RTO defines the maximum tolerable downtime from failure to restoration of normal database operations.

Question 47: Which tool is commonly used in business planning to analyze company position?

CAPEX report
Firmware update sheet
Traffic shaping log
SWOT analysis (Correct answer)

Correct answer: SWOT analysis

A SWOT analysis is a strategic planning tool used to identify and analyze an organization's internal Strengths and Weaknesses, and external Opportunities and Threats. This comprehensive assessment helps businesses understand their current position, evaluate potential strategies, and make informed decisions for future growth and competitive advantage. It provides a foundational understanding for strategic planning.

Question 48: In telecom database administration, what is 'sharding' and when is it typically applied?

Creating read replicas to offload reporting queries
Compressing indexes to reduce storage footprint
Horizontally partitioning data across multiple database servers to distribute load beyond single-server capacity (Correct answer)
Encrypting database files at rest for security compliance

Correct answer: Horizontally partitioning data across multiple database servers to distribute load beyond single-server capacity

Sharding distributes rows across multiple servers based on a shard key, enabling horizontal scale-out when data volume or throughput exceeds single-node limits.

Question 49: A telecom DBA must schedule database maintenance tasks without impacting business-hours operations. Which SQL Agent feature enables this?

Always-on availability groups
Read-only filegroups
Scheduled jobs or maintenance plans with defined time windows (Correct answer)
Database triggers

Correct answer: Scheduled jobs or maintenance plans with defined time windows

Scheduled maintenance plans or SQL Agent jobs allow DBAs to define specific off-peak time windows for index rebuilds, statistics updates, and backups.

Question 50: A telecom CTE review shows a project where developers write tests before writing the actual code. This practice is known as:

Regression Testing
Behavior-Driven Development
Test-Driven Development (TDD) (Correct answer)
Exploratory Testing

Correct answer: Test-Driven Development (TDD)

Test-Driven Development (TDD) requires writing a failing test first, then writing minimum code to pass it, then refactoring.

Question 51: Which US government program provides funding specifically for rural broadband infrastructure deployment that a CTE at a rural carrier should be aware of?

FTC Consumer Protection Fund
FCC E-Rate program
USDA ReConnect Program and FCC BEAD funding (Correct answer)
SBA Small Business Loans

Correct answer: USDA ReConnect Program and FCC BEAD funding

The USDA ReConnect Program and NTIA BEAD (Broadband Equity, Access, and Deployment) program provide billions in grants and loans for deploying broadband infrastructure in unserved and underserved rural US areas.

Question 52: What is 'customer journey analytics' in the context of a telecommunications service provider?

Tracking the geographic movement of mobile subscribers across cell towers
Analyzing technician routes for field service optimization
Mapping and measuring all touchpoints a customer interacts with—from acquisition through support and renewal—to optimize experience and reduce churn (Correct answer)
Reviewing sales rep call logs to assess productivity

Correct answer: Mapping and measuring all touchpoints a customer interacts with—from acquisition through support and renewal—to optimize experience and reduce churn

Journey analytics aggregates cross-channel interaction data to reveal friction points and moments of truth that most strongly influence loyalty and churn.

Question 53: In telecom capacity planning, what does Erlang B formula specifically calculate?

The signal attenuation over a given fiber distance
The maximum data throughput on a broadband link
The probability of call blocking given traffic intensity and number of circuits (Correct answer)
The number of subscribers a cell tower can register simultaneously

Correct answer: The probability of call blocking given traffic intensity and number of circuits

Erlang B calculates the probability that a new call will be blocked (finding all circuits busy) for a given offered traffic load and circuit count, assuming blocked calls are lost.

Question 54: Which SS7 attack allows an adversary to intercept SMS-based two-factor authentication codes sent to telecom subscribers?

SS7 MAP SRI-SM interception (Correct answer)
IMSI catching
GTP tunneling attack
DIAMETER AVP manipulation

Correct answer: SS7 MAP SRI-SM interception

SS7 MAP Send Routing Info for Short Message (SRI-SM) queries allow attackers to redirect SMS messages to a controlled endpoint.

Question 55: What is a milestone in CTE project management?

An optional checkpoint
A daily required task
A significant event marking progress at a key point in the timeline (Correct answer)
A physical construction marker

Correct answer: A significant event marking progress at a key point in the timeline

Milestones are significant checkpoints marking completion of major deliverables or phase transitions.

Question 56: In telecom project risk management, what is the difference between a risk and an issue?

Risks require executive approval; issues are handled by the PM alone
A risk is a potential future event; an issue is a risk that has already occurred (Correct answer)
Issues are documented in the risk register; risks are tracked separately
Risks are always financial; issues are always technical

Correct answer: A risk is a potential future event; an issue is a risk that has already occurred

Risks are uncertain future events that may impact the project; once they occur, they become issues requiring immediate response.

Question 57: When a telecom board authorizes a 'strategic pivot,' what does this imply about the previous strategy?

The board is dissolving the company and selling assets
The strategy was fully successful and is being replicated elsewhere
The strategy requires significant redirection based on market feedback or changing conditions (Correct answer)
The strategy was fundamentally flawed and is being abandoned entirely

Correct answer: The strategy requires significant redirection based on market feedback or changing conditions

A strategic pivot involves a significant but not complete change in strategy direction, typically driven by new market data, competitive dynamics, or technology shifts.

Question 58: What does residual risk mean in CTE practice?

Risk affecting waste materials
Initial risk before assessment
Risk remaining after all controls are implemented (Correct answer)
Budget overrun risk

Correct answer: Risk remaining after all controls are implemented

Residual risk is the level remaining after practical controls are applied. Some is usually accepted as eliminating all risk is rarely feasible.

Question 59: In a high-availability telecom database cluster, what is the purpose of a 'witness' or 'arbiter' node?

To provide a tiebreaker vote during failover to prevent split-brain scenarios (Correct answer)
To store backup copies of all data
To serve read-only queries
To run ETL jobs without impacting primary nodes

Correct answer: To provide a tiebreaker vote during failover to prevent split-brain scenarios

A witness/arbiter node provides an odd quorum vote to prevent split-brain, ensuring only one node assumes the primary role during failover.

Question 60: What does Days Sales Outstanding (DSO) measure in a telecom company's accounts receivable management?

The average duration of a subscriber contract
The average number of days it takes to collect payment after a sale, indicating billing and collection efficiency (Correct answer)
The number of outstanding customer support tickets
The number of days a carrier has been in business

Correct answer: The average number of days it takes to collect payment after a sale, indicating billing and collection efficiency

DSO measures the average collection period for accounts receivable; a rising DSO in telecom indicates billing friction, disputes, or credit quality deterioration that can strain cash flow.

Question 61: What does the 'cone of uncertainty' represent in telecom project planning?

The range of network latency values under load
Decreasing estimate variability as the project matures and more information is available (Correct answer)
The probability distribution of stakeholder satisfaction
Increasing budget risk over the project lifecycle

Correct answer: Decreasing estimate variability as the project matures and more information is available

The cone of uncertainty shows that early estimates have high variability, which narrows as requirements are better understood and work is completed.

Question 62: When a US carrier reports 'free cash flow,' what does this metric represent and why do telecom investors prioritize it?

Net income before depreciation
Revenue minus marketing expenses
Total revenue minus total debt
Operating cash flow minus capital expenditures, representing cash available for dividends, debt repayment, and M&A after sustaining the network (Correct answer)

Correct answer: Operating cash flow minus capital expenditures, representing cash available for dividends, debt repayment, and M&A after sustaining the network

Free cash flow (FCF = operating cash flow minus CapEx) shows actual cash generated after network investment, making it the most important metric for telecom investors assessing dividend sustainability and financial health.

Question 63: A telecom operator's cloud SLA guarantees 99.99% uptime. Approximately how many minutes of downtime per year does this allow?

52.6 minutes (Correct answer)
43.8 minutes
8.7 minutes
4.4 minutes

Correct answer: 52.6 minutes

99.99% uptime (four nines) permits approximately 52.6 minutes of downtime per year, calculated as 0.01% × 525,600 minutes.

Question 64: In telecom capital planning, what is the key distinction between Capital Expenditure (CapEx) and Operating Expenditure (OpEx)?

CapEx covers employee salaries; OpEx covers equipment purchases
CapEx is depreciated immediately; OpEx is amortized over 20 years
CapEx is spending on long-term assets like towers and fiber; OpEx is ongoing costs like maintenance and leases (Correct answer)
CapEx applies only to wireless networks; OpEx applies only to wireline

Correct answer: CapEx is spending on long-term assets like towers and fiber; OpEx is ongoing costs like maintenance and leases

CapEx involves investments in physical assets (network infrastructure, spectrum licenses) that are depreciated over time, while OpEx covers recurring operational costs like network maintenance, energy, and staff.

Question 65: Which multi-stakeholder organization manages the North American Numbering Plan (NANP) under contract with the FCC and CRTC?

USAC (Universal Service Administrative Company)
NANPA (North American Numbering Plan Administrator) (Correct answer)
ATIS (Alliance for Telecommunications Industry Solutions)
NTIA Office of Spectrum Management

Correct answer: NANPA (North American Numbering Plan Administrator)

NANPA serves as the neutral administrator of the NANP, managing area code assignments and numbering resources under contract with the FCC.

Question 66: Under ASC 842 (the US GAAP lease accounting standard), how must telecom companies treat most operating leases for cell site ground leases?

Capitalize them as owned property, plant, and equipment
Recognize a right-of-use (ROU) asset and a corresponding lease liability on the balance sheet (Correct answer)
Expense them entirely in the period incurred with no balance sheet impact
Treat them as off-balance-sheet contingent liabilities

Correct answer: Recognize a right-of-use (ROU) asset and a corresponding lease liability on the balance sheet

ASC 842 requires lessees to recognize a right-of-use asset and lease liability for nearly all leases with terms over 12 months, bringing previously off-balance-sheet operating leases onto the balance sheet.

Question 67: In a carrier-grade telecom architecture, what does the term 'five nines' availability mean?

99.9% uptime, allowing ~8.76 hours downtime per year
99.99% uptime, allowing ~52.6 minutes downtime per year
99.995% uptime, allowing ~26.3 minutes downtime per year
99.999% uptime, allowing ~5.26 minutes downtime per year (Correct answer)

Correct answer: 99.999% uptime, allowing ~5.26 minutes downtime per year

Five nines (99.999%) availability equates to approximately 5.26 minutes of allowable downtime per year, the standard benchmark for carrier-grade systems.

Question 68: A CTE is assessing the financial case for migrating from owned data center infrastructure to a public cloud model. Which financial benefit primarily drives this shift from a balance sheet perspective?

Increased CapEx spending
Eliminating all IT staff immediately
Reducing spectrum acquisition costs
Converting capital expenditure to operating expenditure, improving balance sheet flexibility (Correct answer)

Correct answer: Converting capital expenditure to operating expenditure, improving balance sheet flexibility

Cloud migration converts the large upfront CapEx of owned data center assets into predictable monthly OpEx payments, freeing capital for network investment and improving balance sheet flexibility.

Question 69: The Telecommunications Act of 1996 introduced which concept to promote local competition by requiring ILECs to unbundle their network elements?

Total Element Long-Run Incremental Cost (TELRIC) (Correct answer)
Efficient Component Pricing Rule (ECPR)
Network Access Point (NAP) pricing
Ramsey pricing

Correct answer: Total Element Long-Run Incremental Cost (TELRIC)

TELRIC is the FCC-mandated cost methodology used to set prices for unbundled network elements (UNEs) that ILECs must offer to competitors.

Question 70: A telecom architect must choose between synchronous and asynchronous messaging for an event-driven BSS. Which scenario favors asynchronous messaging?

Real-time credit checks before call completion
SIP INVITE responses requiring sub-second confirmation
Batch processing of daily CDR files to a billing engine (Correct answer)
Emergency 911 call routing decisions

Correct answer: Batch processing of daily CDR files to a billing engine

Asynchronous messaging suits batch or non-time-critical processes like CDR billing where the sender does not need an immediate response to proceed.

Question 71: What does eSIM (embedded SIM) technology offer US consumers and enterprise IoT deployments compared to traditional physical SIM cards?

Higher voice call quality
Mandatory dual-SIM requirements
Remote provisioning of operator profiles without physical SIM swap (Correct answer)
Faster 4G LTE speeds

Correct answer: Remote provisioning of operator profiles without physical SIM swap

eSIM enables over-the-air provisioning and switching of carrier profiles, eliminating the need for physical SIM cards and enabling seamless carrier changes for consumers and IoT devices.

Question 72: Which strategic risk is most associated with 'single-vendor dependency' in a telecom's technology supply chain?

Currency exchange risk on equipment purchases
Concentration risk leading to supply disruption and reduced negotiating power (Correct answer)
Talent acquisition risk for vendor-specific skills
Regulatory compliance exposure

Correct answer: Concentration risk leading to supply disruption and reduced negotiating power

Single-vendor dependency creates concentration risk where supply disruptions, price increases, or vendor failure can critically impact network operations and service delivery.

Question 73: When applying the Lean methodology to a telecom provisioning process, which of the following is classified as 'waste' (muda)?

Automated order validation
Technician skill certification
Waiting time between order entry and system activation (Correct answer)
Customer signature collection

Correct answer: Waiting time between order entry and system activation

In Lean, any waiting time where no value is being added to the customer is classified as waste and should be eliminated or minimized.

Question 74: What is a near-miss report in CTE practice?

A project near deadline
An employee near target
A near break-even report
Documentation of an event that could have caused harm but did not (Correct answer)

Correct answer: Documentation of an event that could have caused harm but did not

Near-miss reports document events where harm almost occurred, providing data to prevent future incidents.

Question 75: When setting organizational strategy, what distinguishes a 'stretch goal' from a standard performance target?

Stretch goals are set by regulators, not management
Stretch goals focus exclusively on cost reduction
Stretch goals are only applicable to R&D departments
Stretch goals are aspirational targets that require breakthrough thinking and capability development (Correct answer)

Correct answer: Stretch goals are aspirational targets that require breakthrough thinking and capability development

Stretch goals push organizations beyond incremental improvement by requiring innovative approaches and new capabilities to achieve ambitious, often seemingly unreachable targets.

Question 76: A telecom company wants to proactively reduce truck rolls. Which technology investment best achieves this?

Deploying remote diagnostics and network monitoring tools (Correct answer)
Increasing call center headcount
Expanding retail store footprint
Offering longer installation windows

Correct answer: Deploying remote diagnostics and network monitoring tools

Remote diagnostics allow technicians to identify and resolve network issues without a physical visit, directly reducing costly truck rolls.

Question 77: Which protocol is used to distribute traffic engineering information in an MPLS network, enabling constraint-based path computation?

SIP
RSVP-TE with OSPF-TE or IS-IS-TE extensions (Correct answer)
H.323
DHCP

Correct answer: RSVP-TE with OSPF-TE or IS-IS-TE extensions

RSVP-TE combined with TE extensions to OSPF or IS-IS distributes link-state TE information and signals label-switched paths with specific bandwidth constraints.

Question 78: A telecom DBA must restore a corrupted table in a production database with minimal impact. Which approach is MOST appropriate?

Shut down the application and perform a full system restore
Restore the entire database from the last full backup
Drop and recreate the table with no data
Restore only the affected table or tablespace using granular restore from backup, then apply transaction logs (Correct answer)

Correct answer: Restore only the affected table or tablespace using granular restore from backup, then apply transaction logs

Granular table-level restore combined with transaction log replay minimizes downtime by recovering only the affected object rather than the entire database.

Question 79: Which customer segmentation approach allows a telecom to prioritize operational resources toward highest-value accounts during a service outage?

Demographic segmentation
Geographic segmentation
Lifetime Value (LTV) tiering (Correct answer)
Psychographic segmentation

Correct answer: Lifetime Value (LTV) tiering

LTV tiering lets operators prioritize restoration efforts toward high-revenue customers, protecting churn risk where financial impact is greatest.

Question 80: Which SDLC risk is most specific to telecommunications software that must remain operational 24/7 during upgrades?

Inadequate documentation
Zero-downtime deployment failure (Correct answer)
Scope creep
Slow developer onboarding

Correct answer: Zero-downtime deployment failure

Telecom systems require zero-downtime (rolling or blue-green) deployments; failure to achieve this causes service outages that violate SLAs.

Question 81: The FCC's Open Internet Order (net neutrality) rules classify broadband internet access service under which Title of the Communications Act when applying common carrier obligations?

Title VI (Cable Television)
Title I (Ancillary Authority)
Title III (Radio Licensing)
Title II (Common Carriers) (Correct answer)

Correct answer: Title II (Common Carriers)

The 2015 Open Internet Order reclassified broadband as a Title II telecommunications service to apply common carrier net neutrality obligations.

Question 82: When evaluating a telecom merger in the US, what is the financial significance of 'synergies' in the deal valuation?

Synergies represent the interest costs of the acquisition financing
Synergies describe the combined headcount of both organizations
Cost and revenue synergies represent incremental value created by combining two companies that neither could achieve independently (Correct answer)
Synergies refer to the regulatory fees paid to the FCC

Correct answer: Cost and revenue synergies represent incremental value created by combining two companies that neither could achieve independently

Synergies — including network cost reduction, overlapping OpEx elimination, and combined pricing power — justify paying a premium over standalone value in telecom M&A transactions.

Question 83: In telecom cost management, what does 'total cost of ownership' (TCO) analysis include beyond the initial purchase price of network equipment?

Only the upfront equipment acquisition cost
Only labor costs for installation
Acquisition cost plus installation, maintenance, energy consumption, training, and end-of-life disposal costs over the asset's lifetime (Correct answer)
Only ongoing software licensing fees

Correct answer: Acquisition cost plus installation, maintenance, energy consumption, training, and end-of-life disposal costs over the asset's lifetime

TCO encompasses all direct and indirect costs over an asset's lifecycle including purchase, deployment, energy, maintenance, support contracts, and eventual decommissioning to reveal the true cost of ownership.

Question 84: What is churn rate and why is it a critical financial metric for US mobile carriers?

The turnover rate of network equipment
The percentage of subscribers who cancel service in a given period, directly impacting recurring revenue (Correct answer)
The rate of billing system processing errors
The rate at which the network processes data packets

Correct answer: The percentage of subscribers who cancel service in a given period, directly impacting recurring revenue

Churn rate measures subscriber attrition; high churn erodes the recurring revenue base and forces expensive re-acquisition spending to maintain subscriber counts, directly affecting profitability.

Question 85: Under the Communications Assistance for Law Enforcement Act (CALEA), telecommunications carriers must ensure their equipment supports which capability?

Emergency 911 call prioritization
Content filtering for minors
International call blocking
Lawful electronic surveillance intercept (Correct answer)

Correct answer: Lawful electronic surveillance intercept

CALEA requires carriers to build lawful intercept capabilities into their systems so law enforcement can conduct authorized electronic surveillance.

Question 86: What is the principle of least privilege in CTE technology?

Users get only the minimum access needed for their role (Correct answer)
Everyone shares credentials
All users get administrator access
Access based on seniority

Correct answer: Users get only the minimum access needed for their role

Least privilege limits access to only what is needed, reducing potential damage from errors or compromised accounts.

Question 87: What is a risk matrix used for in CTE practice?

Mapping facility layouts
Tracking attendance
Creating task schedules
Evaluating risks by plotting likelihood against impact severity (Correct answer)

Correct answer: Evaluating risks by plotting likelihood against impact severity

A risk matrix plots probability against consequences to prioritize which risks need immediate attention.

Question 88: Which cloud storage type is most appropriate for a telecom CDN storing large media files that are accessed frequently?

Block storage
File storage
Object storage (hot tier) (Correct answer)
Archive storage (cold tier)

Correct answer: Object storage (hot tier)

Hot-tier object storage offers high throughput and low latency for frequently accessed large binary objects like media files.

Question 89: Which regulation focuses on customer data privacy?

FDIC
ISO 9001
GDPR (Correct answer)
CFA

Correct answer: GDPR

The General Data Protection Regulation (GDPR) is a comprehensive data privacy and security law enacted by the European Union that focuses on customer data privacy. It imposes strict rules on how organizations, including telecommunication companies, collect, process, and store the personal data of individuals within the EU, significantly impacting global data handling practices.

Question 90: In telecom software projects, 'technical debt' accumulated during rapid feature releases is best addressed through which SDLC activity?

Refactoring during maintenance iterations (Correct answer)
Increasing sprint velocity
Skipping code reviews
Deferring regression tests

Correct answer: Refactoring during maintenance iterations

Refactoring during planned maintenance iterations systematically reduces technical debt without disrupting service continuity.

Question 91: Which layer of the OSI model is primarily responsible for routing?

Data Link layer
Application layer
Transport layer
Network layer (Correct answer)

Correct answer: Network layer

The Network layer (Layer 3) of the OSI model is fundamentally responsible for logical addressing and routing data packets across different networks. It determines the best path for data to travel from source to destination, using IP addresses to identify devices and routers to forward packets between subnets. This layer ensures end-to-end delivery of data across diverse network segments.

Question 92: Which performance metric indicates that a telecom database is experiencing I/O bottlenecks rather than CPU bottlenecks?

High CPU utilization with low disk wait times
High network throughput with low latency
High disk I/O wait times with low CPU utilization (Correct answer)
High memory usage with frequent garbage collection

Correct answer: High disk I/O wait times with low CPU utilization

High disk I/O wait times with idle CPUs indicate queries are waiting on storage reads/writes, pointing to disk throughput or latency as the limiting factor.

Question 93: Which FCC rule requires telecommunications carriers to contribute to the Universal Service Fund (USF) based on their interstate and international end-user revenues?

47 CFR Part 68
47 CFR Part 36
47 CFR Part 54 (Correct answer)
47 CFR Part 64

Correct answer: 47 CFR Part 54

47 CFR Part 54 establishes the Universal Service Fund contribution requirements for eligible telecommunications carriers.

Question 94: Which protocol provides secure shell access for remote network device management and encrypts all session traffic?

SSH (Secure Shell) (Correct answer)
Telnet
SNMP v1
TFTP

Correct answer: SSH (Secure Shell)

SSH encrypts all data in transit, replacing the insecure Telnet protocol for remote device management.

Question 95: Which financial metric is most critical for evaluating whether a telecom's strategy is creating shareholder value over time?

Revenue Growth Rate
EBITDA Margin
Economic Value Added (EVA) (Correct answer)
Gross Margin Percentage

Correct answer: Economic Value Added (EVA)

Economic Value Added (EVA) measures the profit generated above the cost of capital, directly indicating whether the company's strategy creates or destroys shareholder value.

Question 96: In telecom network security, what is 'IMSI catching' and who is most at risk?

Harvesting IMSI numbers from SIM cards via malware; enterprise mobile device users
Extracting IMSI from SS7 databases; roaming international travelers
Cloning SIM cards through social engineering; high-value corporate executives
Using a fake base station to intercept mobile device identifiers; subscribers in the coverage area (Correct answer)

Correct answer: Using a fake base station to intercept mobile device identifiers; subscribers in the coverage area

An IMSI catcher (stingray) impersonates a legitimate cell tower to force nearby devices to connect, revealing their IMSI and enabling tracking or interception.

Question 97: In the context of telecom strategic leadership, what does 'decision rights clarity' address?

Regulatory rights during merger approvals
Clearly defining who has authority to make which decisions at each organizational level (Correct answer)
Legal authority over spectrum licensing decisions
Customer rights in service-level agreements

Correct answer: Clearly defining who has authority to make which decisions at each organizational level

Decision rights clarity defines which roles have authority to make specific decisions, preventing bottlenecks and accountability gaps in large telecom organizations.

Question 98: Which protocol is used to securely distribute and manage encryption keys in IPsec VPNs?

SSL
L2TP
IKE (Internet Key Exchange) (Correct answer)
GRE

Correct answer: IKE (Internet Key Exchange)

IKE (Internet Key Exchange) handles secure key negotiation and management for IPsec security associations.

Question 99: Which security architecture principle requires that every access request in a telecom network be authenticated and authorized regardless of network location?

Defense in depth
Zero Trust Architecture (Correct answer)
Perimeter-based security
Network Address Translation

Correct answer: Zero Trust Architecture

Zero Trust Architecture operates on 'never trust, always verify,' eliminating implicit trust based on network location or IP address.

Question 100: A CTE is conducting a make-vs-buy analysis for a new regional dark fiber network. Which factor most strongly favors building owned dark fiber over leasing IRUs?

Lower upfront capital expenditure
Avoiding the need to hire outside engineering firms
Faster time-to-market than leasing options
Long-term control over capacity, routing, and cost for high-traffic corridors (Correct answer)

Correct answer: Long-term control over capacity, routing, and cost for high-traffic corridors

Owning dark fiber gives operators full control over capacity upgrades, route selection, and eliminates long-term lease costs on high-volume corridors, improving economics at scale.

Question 101: In telecom cloud environments, what is the primary purpose of a 'sidecar' container pattern?

To run backup copies of the main application container
To provide a separate container for storing persistent data
To augment a main container with auxiliary functions like logging, monitoring, or proxying without modifying it (Correct answer)
To act as a load balancer between microservices

Correct answer: To augment a main container with auxiliary functions like logging, monitoring, or proxying without modifying it

The sidecar pattern deploys a helper container alongside the main container in the same pod, injecting cross-cutting concerns without changing the main application.

Question 102: Which financial ratio do telecom analysts use to assess a carrier's ability to service its debt, calculated as EBITDA divided by total interest expense?

Price-to-earnings ratio
Debt-to-equity ratio
Current ratio
Interest coverage ratio (Correct answer)

Correct answer: Interest coverage ratio

The interest coverage ratio measures how many times a company's EBITDA covers its annual interest payments, indicating financial health and debt serviceability.

Question 103: Which SQL window function is most useful for calculating a rolling 7-day average of daily active users in a telecom analytics query?

PARTITION BY user_id ORDER BY date
GROUP BY date with AVG()
AVG() OVER (ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW) (Correct answer)
COUNT(DISTINCT user_id) without a window frame

Correct answer: AVG() OVER (ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW)

A ROWS BETWEEN 6 PRECEDING AND CURRENT ROW frame computes the average across the current day and the six preceding days, yielding a true 7-day rolling average.

Question 104: What is the first step in CTE risk assessment?

Purchasing insurance
Identifying potential hazards and threats (Correct answer)
Assigning blame
Ignoring minor risks

Correct answer: Identifying potential hazards and threats

Risk assessment begins with systematic identification of all potential hazards, forming the foundation for all subsequent analysis.

Question 105: Which standard body publishes the NEBS (Network Equipment Building System) standards widely adopted for telecom equipment in North America?

Telcordia (formerly Bellcore) (Correct answer)
TIA
IEEE
ANSI

Correct answer: Telcordia (formerly Bellcore)

NEBS standards are published by Telcordia (formerly Bellcore) and define environmental, spatial, and hardware requirements for telecom equipment.

Question 106: What does data integrity mean in CTE practice?

Accuracy, consistency, and reliability of data throughout its lifecycle (Correct answer)
Physical security of hardware
Visualization quality
Data processing speed

Correct answer: Accuracy, consistency, and reliability of data throughout its lifecycle

Data integrity means maintaining accuracy, consistency, and reliability from collection through use.

Question 107: A telecom executive is implementing OKRs (Objectives and Key Results). What is the recommended confidence level for a well-calibrated OKR at the end of the quarter?

Around 60-70% achievement, indicating appropriate ambition (Correct answer)
50% achievement to signal maximum risk-taking
100% achievement — all key results fully met
90-100% achievement to demonstrate operational excellence

Correct answer: Around 60-70% achievement, indicating appropriate ambition

Google's OKR methodology suggests ~60-70% achievement indicates the objective was ambitious enough; consistent 100% implies goals were set too conservatively.

Question 108: What is 'cloud bursting' in the context of telecom infrastructure?

Automatically scaling workloads from private to public cloud during demand spikes (Correct answer)
Overprovisioning cloud resources beyond actual need
Exceeding cloud provider SLA thresholds
A security breach caused by misconfigured cloud APIs

Correct answer: Automatically scaling workloads from private to public cloud during demand spikes

Cloud bursting allows a private cloud to offload peak traffic automatically to public cloud resources when local capacity is exhausted.

Question 109: Under FCC Part 68 rules, what must all terminal equipment connected to the PSTN have?

FCC registration and display of an FCC Registration Number (FRN)
NEBS Level 3 certification
A valid FCC license issued to the manufacturer
An approved REN (Ringer Equivalence Number) label (Correct answer)

Correct answer: An approved REN (Ringer Equivalence Number) label

Part 68 requires terminal equipment to display a Ringer Equivalence Number (REN) label along with FCC registration marking to protect the telephone network.

Question 110: Which cloud observability pillar provides the ability to trace a single customer request as it flows through multiple microservices in a telecom platform?

Logs
Distributed tracing (Correct answer)
Alerts
Metrics

Correct answer: Distributed tracing

Distributed tracing (e.g., Jaeger, Zipkin) propagates a unique trace ID across all microservices, enabling end-to-end visibility of a single request's journey.

Certified Telecommunications Executive (CTE)

The CTE certification validates advanced competency in telecommunications leadership, covering network infrastructure, cloud technologies, financial management, emerging technologies, and strategic operations for senior telecom professionals.

110

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120 min

Time Limit

76%

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