Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q611: How does a digital clock use a divide-by-60 counter?
- A: To count hours
- B: To count seconds and minutes
- C: To measure frequency
- D: To reset the clock
View Answer
B
Q612: What is the main function of the AND gate in a divide-by-60 counter circuit?
- A: To count up to 100
- B: To divide the clock signal
- C: To enable the counter for each digit
- D: To reset the counter
View Answer
C
Q613: How are the state transitions of a sequential circuit determined?
- A: By the current input signals only
- B: By the current state and the input signals
- C: By the clock frequency
- D: By the flip-flop type
View Answer
B
Q614: What does a state diagram represent in sequential circuit design?
- A: The physical layout of the circuit
- B: The sequence of states through which the circuit progresses
- C: The timing diagram of the circuit
- D: The logic gates used in the circuit
View Answer
B
Q615: In a 3-bit Up-Counter, what is the next state when the current state is 010 and X=0?
- A: 11
- B: 100
- C: 1
- D: 101
View Answer
A
Q616: What is the role of Karnaugh Maps in the design of sequential circuits?
- A: To simplify the Boolean expressions for flip-flop inputs
- B: To determine the clock frequency
- C: To design the physical layout of the circuit
- D: To analyze the signal timing
View Answer
A
Q617: How is a 3-bit Up/Down counter implemented using flip-flops?
- A: By connecting flip-flops in series without additional logic
- B: By connecting flip-flops and using additional logic for counting direction
- C: By using a single flip-flop with a counter IC
- D: By adjusting the clock frequency
View Answer
B
Q618: What is the purpose of the load input (LOAD) in a 74HC190 counter IC?
- A: To clear the counter
- B: To set the counter to a specific value
- C: To enable counting
- D: To provide the clock signal
View Answer
B
Q619: How are flip-flop inputs determined in a sequential circuit design?
- A: From the next-state table
- B: From the Karnaugh Maps
- C: From the current state only
- D: From the clock frequency
View Answer
A
Q620: In a frequency counter, what effect does reducing the sampling interval have on accuracy?
- A: It improves accuracy
- B: It decreases accuracy
- C: It has no effect on accuracy
- D: It increases the count value
View Answer
B