Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q691: What operation is performed by the 74HC165 shift register?
- A: Parallel In/Serial Out
- B: Serial In/Parallel Out
- C: Serial In/Serial Out
- D: Parallel In/Parallel In
View Answer
A
Q692: In a Parallel In/Serial Out shift register, how is data entered into the register?
- A: Serially
- B: Parallelly
- C: Asynchronously
- D: Synchronously
View Answer
B
Q693: What is the main purpose of a Rotate Right operation in a shift register?
- A: To shift data left
- B: To shift data right
- C: To clear the register
- D: To load data parallelly
View Answer
B
Q694: How is the 74HC195 shift register controlled?
- A: By setting shift/load signals
- B: By adjusting clock frequency
- C: By varying the data input
- D: By applying a clear signal
View Answer
A
Q695: What is unique about the Johnson Counter?
- A: It rotates data left
- B: It rotates data right
- C: It sequences through 2^n states
- D: It sequences through 2n states
View Answer
D
Q696: How does a Ring Counter start its operation?
- A: With all flip-flops set low
- B: With all flip-flops set high
- C: With only the first flip-flop set high
- D: With all flip-flops set randomly
View Answer
C
Q697: In the Johnson Counter, how many states does a 4-bit counter have?
- A: 8
- B: 10
- C: 16
- D: 4
View Answer
A
Q698: How does a Parallel In/Parallel Out shift register work?
- A: Shifts data in serial
- B: Loads and outputs data in parallel
- C: Clears data asynchronously
- D: Loads data in serial
View Answer
B
Q699: A 8-bit serial in / parallel out shift register contains the value “8”, _____ clock signal(s) will be required to shift the value completely out of the register.
- A: 1
- B: 2
- C: 4
- D: 8
View Answer
D
Q700: In asynchronous transmission when the transmission line is idle, _________
- A: It is set to logic low
- B: It is set to logic high
- C: Remains in previous state
- D: State of transmission line is not used to start transmission
View Answer
B