Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q601: How many cells are there in a 3-variable Karnaugh Map?
- A: 4
- B: 8
- C: 16
- D: 32
View Answer
C
Q602: In an Up/Down Counter, what does the UP/DOWN input determine?
- A: The number of bits
- B: The direction of counting
- C: The frequency of the clock
- D: The reset function
View Answer
B
Q603: What is the primary function of the MAX/MIN output in the 74HC190 IC?
- A: To indicate the terminal count
- B: To enable the counter
- C: To reset the counter
- D: To provide clock pulses
View Answer
A
Q604: How does an Up/Down counter switch between counting up and down?
- A: By changing the clock frequency
- B: By altering the state of the UP/DOWN input
- C: By resetting the counter
- D: By adjusting the flip-flops
View Answer
B
Q605: What is the purpose of the Ripple Clock Output (RCO) in a counter IC?
- A: To provide the maximum count value
- B: To enable multiple counter ICs in cascade
- C: To set the counter to zero
- D: To indicate a terminal count
View Answer
B
Q606: In a 74HC190 IC, what does the D/U input control?
- A: The counter speed
- B: The direction of counting
- C: The clock frequency
- D: The load function
View Answer
B
Q607: How are glitches in counter outputs typically removed?
- A: By using a higher clock frequency
- B: By enabling the decoder during the clock's positive phase
- C: By adjusting the input signals
- D: By changing the counter IC
View Answer
B
Q608: The divide-by-60 counter in digital clock is implemented by using two cascading counters:
- A: Mod-6, Mod-10
- B: Mod-50, Mod-10
- C: Mod-10, Mod-50
- D: Mod-50, Mod-6
View Answer
A
Q609: What does the 'strobing method' refer to in decoding counter outputs?
- A: Enabling the decoder outputs before the clock signal
- B: Enabling the decoder outputs after glitches have settled
- C: Using a higher clock frequency
- D: Resetting the counter at intervals
View Answer
B
Q610: In a frequency counter, how is the frequency of an unknown signal calculated?
- A: By measuring the voltage
- B: By counting the number of pulses in a sampling interval
- C: By adjusting the clock signal
- D: By analyzing the signal waveform
View Answer
B