Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q581: What does a Synchronous Decade Counter count up to?
- A: 1111
- B: 1001
- C: 1010
- D: 1100
View Answer
B
Q582: What happens when a Synchronous Decade Counter reaches the state 1001?
- A: Clears all flip-flops
- B: Continues counting
- C: Resets to state 0000
- D: Stops counting
View Answer
C
Q583: How are the J-K inputs of the first flip-flop in a Decade Counter typically connected?
- A: To logic low
- B: To a clock signal
- C: To logic high
- D: To a Boolean function
View Answer
C
Q584: When does the output state of the second flip-flop in a Decade Counter change?
- A: When F0 is 1 and F3 is 0
- B: When F0 is 0 and F3 is 1
- C: When F1 is 1
- D: When F2 is 0
View Answer
A
Q585: What Boolean expression determines the inputs J-K of the third flip-flop in a Decade Counter?
- A: F0 + F2
- B: F0F1
- C: F1 + F2
- D: F0F3
View Answer
B
Q586: What Boolean expression determines the inputs J-K of the fourth flip-flop in a Decade Counter?
- A: F0F1F2 + F0F3
- B: F0 + F1 + F2
- C: F1F2 + F0F3
- D: F0F1F2 + F1F3
View Answer
A
Q587: What does a 3-bit Asynchronous Down-Counter do at interval t6 when configured for a truncated sequence?
- A: Sets all flip-flops to 1
- B: Toggles output to zero
- C: Continues counting
- D: Resets to state 000
View Answer
A
Q588: What component is necessary for a 4-bit Synchronous Binary Counter to operate properly?
- A: A 2-input OR gate
- B: A 3-input AND gate
- C: A 4-input NOR gate
- D: A flip-flop with delay
View Answer
B
Q589: What is the Modulus number in a Mod-n Synchronous Counter?
- A: The number of states the counter can count
- B: The number of flip-flops used
- C: The number of clocks required
- D: The frequency of the input clock
View Answer
A
Q590: What type of input does the 74HC163 Synchronous Counter use for resetting the counter output?
- A: Active-high CLR
- B: Active-low CLR
- C: Active-high LOAD
- D: Active-low LOAD
View Answer
B