FREE BEE Bachelor of Electrical Engineering Digital Logic and Microprocessors Questions and Answers Flashcards
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Read the first 6 FREE BEE Bachelor of Electrical Engineering Digital Logic and Microprocessors Questions and Answers flashcards as text
In a JK flip-flop, what happens when both J and K inputs are set to 1?
Answer: The output toggles to the opposite state
When both J and K are high, the JK flip-flop toggles its output state on each active clock edge, which is its key advantage over the SR flip-flop.
Which interrupt in the 8085 microprocessor is non-maskable?
Answer: TRAP
TRAP is the only non-maskable interrupt in the 8085, meaning it cannot be disabled by software and always gets serviced.
How many control lines are required for a 16-to-1 multiplexer?
Answer: 4
A 16-to-1 MUX requires 4 select lines because 2^4 = 16, allowing selection of any one of the 16 inputs.
What does the term 'pipeline stall' refer to in microprocessor architecture?
Answer: A delay inserted when a data dependency prevents the next instruction from executing
A pipeline stall (or bubble) occurs when the processor must delay instruction execution because a required operand is not yet available from a prior instruction.
Which universal gate can be used alone to implement any Boolean function?
Answer: NAND
NAND is a universal gate because any Boolean function, including AND, OR, and NOT, can be constructed using only NAND gates.
What is the resolution of a 10-bit digital-to-analog converter (DAC) with a 5V reference voltage?
Answer: Approximately 4.88 mV
The resolution is calculated as 5V / (2^10 - 1) = 5V / 1023 ≈ 4.88 mV per step.