CBSE Study Guide 2026

Everything you need to pass the CBSE exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 CBSE Exam Format at a Glance

Questions

90 min

Time Limit

70.00%

Passing Score

Take a Full CBSE Exam Simulation →

📚 CBSE Topics to Study (69)

Accreditation Process · 7 cards Accreditation Process · 7 cards Accreditation Process · 7 cards Accreditation Process · 7 cards Architectural and Design Security · 7 cards Architectural and Design Security · 7 cards Architectural and Design Security · 7 cards Architectural and Design Security · 7 cards Blockchain Cryptography Fundamentals · 7 cards Blockchain Cryptography Fundamentals · 7 cards Blockchain Cryptography Fundamentals · 7 cards Blockchain Cryptography Fundamentals · 7 cards Blockchain System Testing · 7 cards Blockchain System Testing · 7 cards Blockchain System Testing · 7 cards Blockchain System Testing · 7 cards Blockchain Threat Modeling · 7 cards Blockchain Threat Modeling · 7 cards Blockchain Threat Modeling · 7 cards Blockchain Threat Modeling · 7 cards Career Applications and Benefits · 7 cards Career Applications and Benefits · 7 cards Career Applications and Benefits · 7 cards Career Applications and Benefits · 7 cards Consensus Algorithm Security · 7 cards Consensus Algorithm Security · 7 cards Consensus Algorithm Security · 7 cards Consensus Algorithm Security · 7 cards Credential Curriculum and Topics · 7 cards Credential Curriculum and Topics · 7 cards

See all 69 topics as flashcards →

✍️ Sample CBSE Questions & Answers

1. A developer deploys a contract that reads price data from a Chainlink oracle but does not check the 'updatedAt' timestamp. What vulnerability does this create?

✓ The contract may use stale price data if the oracle has not updated recently, enabling price manipulation exploits

Without validating that the oracle's updatedAt timestamp is recent, the contract may act on stale prices during network outages or oracle failures, enabling attackers to profit from the discrepancy.

2. What does 'transaction malleability' allow an attacker to do at the network level before a transaction is confirmed?

✓ Alter the transaction ID (txid) by modifying the scriptSig without changing its validity

Transaction malleability lets a third party tweak the scriptSig data, producing a different txid for the same economic transaction, which can confuse tracking systems.

3. In a blockchain security audit, which property is verified by 'liveness testing'?

✓ That the network eventually processes valid transactions

Liveness testing confirms that the blockchain system continues to make progress and process valid transactions under normal and adverse conditions.

4. In a threshold signature scheme (t-of-n), what happens cryptographically if fewer than t key shares attempt to reconstruct the private key?

✓ They obtain no information about the private key due to the information-theoretic security of secret sharing

In Shamir's Secret Sharing (the basis of most threshold schemes), fewer than t shares reveal zero information about the secret due to the polynomial construction used.

5. What is the primary security vulnerability associated with paper wallets?

✓ Physical loss, theft, or destruction permanently destroys access to funds

Paper wallets exist only as physical objects; if lost, stolen, burned, or deteriorated, the private key is permanently irrecoverable with no backup mechanism.

6. What is the primary purpose of a blockchain node's mempool (memory pool) from a security perspective?

✓ Holding unconfirmed transactions pending inclusion in a block

The mempool temporarily holds unconfirmed transactions; attackers can exploit it via transaction pinning or fee manipulation to delay or block legitimate transactions.

🎯 Free CBSE Practice Tests

Blockchain Cryptography Fundamentals · 7 questions Blockchain Cryptography Fundamentals · 7 questions Consensus Algorithm Security · 7 questions Credential Overview · 7 questions Credential Overview · 7 questions Career Applications and Benefits · 7 questions Key Management and Wallet Security · 7 questions Key Management and Wallet Security · 7 questions Key Management and Wallet Security · 7 questions Blockchain System Testing · 7 questions

📖 CBSE Guides & Articles

Your CBSE Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 CBSE Flashcards (461)🏆 CBSE Exam Simulation

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