Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q641: Which flip-flop type is used in the provided 3-bit up-counter example?
- A: J-K flip-flop
- B: D flip-flop
- C: S-R flip-flop
- D: T flip-flop
View Answer
A
Q642: What is the result of setting J=0 in a J-K flip-flop transition table?
- A: The next state output remains 0
- B: The next state output is set to 1
- C: The flip-flop toggles between 0 and 1
- D: The flip-flop is set to 1
View Answer
A
Q643: How is the frequency of an unknown signal determined using a frequency counter?
- A: By counting the number of input signal pulses
- B: By measuring the voltage of the input signal
- C: By comparing with a known frequency
- D: By calculating the time interval and pulse count
View Answer
A
Q644: What is the function of the 3-input AND gate in a frequency counter circuit?
- A: To enable the counter during the sampling interval
- B: To reset the counter before counting
- C: To display the counter output
- D: To adjust the sampling interval
View Answer
A
Q645: What does the Karnaugh map for J2 and K2 inputs show?
- A: Simplified logic expressions for flip-flop inputs
- B: The timing sequence for the frequency counter
- C: The transition table for S-R flip-flops
- D: The states of the frequency counter
View Answer
A
Q646: What is a key feature of the S-R flip-flop transition table?
- A: It cannot have both S and R inputs set to 1 simultaneously
- B: It provides timing diagrams
- C: It simplifies Karnaugh maps
- D: It lists next-state transitions for counters
View Answer
A
Q647: What does the S-R flip-flop transition table use for its inputs?
- A: Valid S and R input combinations
- B: J and K input states
- C: Timing diagram information
- D: Frequency counter settings
View Answer
A
Q648: What does the D flip-flop transition table indicate?
- A: It lists the flip-flop inputs and their output transitions
- B: It describes the timing of flip-flops
- C: It shows the Karnaugh map for flip-flops
- D: It details the J-K flip-flop operation
View Answer
A
Q649: How does the D flip-flop follow the input according to its transition table?
- A: The output directly matches the input
- B: The output is inverted relative to the input
- C: The output is always high
- D: The output is always low
View Answer
A
Q650: What information is given by the Karnaugh maps for D flip-flop inputs?
- A: Simplified Boolean expressions for the inputs
- B: Transition times for each state
- C: State changes for J-K flip-flops
- D: The next-state transitions of the flip-flops
View Answer
A