Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q211: Which of the following is NOT a combinational logic circuit?
- A: Adder
- B: Multiplexer
- C: Register
- D: Encoder
View Answer
C
Q212: The output of an XNOR gate is 1 when ____________
- A: I Only
- B: IV Only
- C: I and IV only
- D: II and III only
View Answer
C
Q213: NAND gate is formed by connecting _________
- A: AND Gate and then NOT Gate
- B: NOT Gate and then AND Gate
- C: AND Gate and then OR Gate
- D: OR Gate and then AND Gate
View Answer
A
Q214: Which gate can be used to implement an OR gate using NAND gates?
- A: NOR Gate
- B: XOR Gate
- C: AND Gate
- D: Combination of NAND Gates
View Answer
D
Q215: What is the output of a 2-input NOR gate when both inputs are 1?
- A: zero
- B: 1
- C: 10
- D: 1
View Answer
A
Q216: How is the NOT function represented using a NAND gate?
- A: Connecting both inputs together
- B: Connecting both inputs separately
- C: Using additional OR gates
- D: Connecting additional NOT gates
View Answer
A
Q217: What is the symbolic representation of a NAND gate?
- A: A circle
- B: A triangle
- C: A rectangle
- D: A bubble at the output
View Answer
D
Q218: How is the expression for a 2-input OR gate written?
- A: A . B
- B: A + B
- C: A - B
- D: A / B
View Answer
B
Q219: What is the purpose of timing diagrams in digital logic?
- A: To describe the logical operations
- B: To show the performance of logic gates over time
- C: To represent circuit symbols
- D: To illustrate binary number systems
View Answer
B
Q220: In which situation does an AND gate output 0?
- A: When all inputs are 1
- B: When all inputs are 0
- C: When any input is 0
- D: When any input is 1
View Answer
C