Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q571: How is a Down-counter implemented?
- A: By using a different clock signal
- B: By reversing the Q outputs
- C: By connecting Q output to next flip-flop
- D: By using synchronous flip-flops
View Answer
C
Q572: What does a Down-counter do in a truncated sequence?
- A: Counts up to a predefined value
- B: Counts down to zero
- C: Counts down to a predefined value
- D: Repeats counting sequence
View Answer
C
Q573: How is a Down-counter configured to count a truncated sequence?
- A: By resetting to zero
- B: By presetting to maximum count
- C: By skipping intermediate values
- D: By clearing the flip-flops at zero
View Answer
B
Q574: What is the primary drawback of Asynchronous counters in high-frequency applications?
- A: High power consumption
- B: Propagation delay
- C: High cost
- D: Large size
View Answer
B
Q575: What is used to avoid timing problems in counters with multiple bits?
- A: Asynchronous counters
- B: Increased clock speed
- C: Synchronous counters
- D: Lower clock frequency
View Answer
C
Q576: How do Synchronous counters differ from Asynchronous counters?
- A: Use separate clock signals
- B: Use a common clock signal
- C: Require more flip-flops
- D: Cannot be used for high frequencies
View Answer
B
Q577: In a 2-bit Synchronous counter, what happens when F0 toggles?
- A: F1 remains unchanged
- B: F1 toggles immediately
- C: F0 resets to zero
- D: Both F0 and F1 toggle simultaneously
View Answer
A
Q578: What is needed in a 3-bit Synchronous counter for proper operation?
- A: A flip-flop with delayed output
- B: An OR gate
- C: An AND gate
- D: A T flip-flop
View Answer
C
Q579: How many flip-flops are used in a 4-bit Synchronous counter?
- A: Two
- B: Three
- C: Four
- D: Five
View Answer
C
Q580: What is the role of the AND gate in a multi-bit Synchronous counter?
- A: Clears the counter
- B: Sets all flip-flops to zero
- C: Ensures correct count sequence
- D: Connects clock signals
View Answer
C