﻿ Digital Electronics Solved MCQ Problems

# Digital Electronics Objective Questions – Set 8

## Digital Electronics Solved MCQ Problems 1. An exclusive NOR gate is logically equivalent to

A) NOT gate followed by a NOR gate
B) inverter followed by an X-OR gate
C) complement of a NOR gate
D) X-OR gate followed by an inverter

2. The X-OR and X-NOR gates can have how many inputs?

A) 4
B) any number
C) 2
D) 1

3. The logic expression A + B can be implemented by giving inputs A and B to a two-input

A) X-NOR gate
B) X-OR gate
C) NOR gate
D) NAND gate

4. Which of the following is a self-complementing code?

A) XS-3 code
B) Hamming code
C) Gray code
D) cyclic code

5. How many NOR gates are required to obtain AND operation?

A) 4
B) 1
C) 2
D) 3

6. The NOR gate can function as a NOT gate if

A) one input is set to 0
B) all inputs are connected together
C) one input is set to 1
D) inputs are left open

7. What is the minimum number of NAND gates required to realize an X-OR gate?

A) 3
B) 5
C) 4
D) 6

8. The logic expression AB can be implemented by giving the inputs A and B to a two-input

A) X-OR gate
B) X-NOR gate
C) NOR gate
D) NAND gate

9. The output of a NOR gate is high

A) only when all the inputs are high
B) only when all the inputs are low
C) only when at least one input is high
D) only when at least one input is low

10. The output of a NAND gate is low

A) only when at least one input is high
B) only when all the inputs are low
C) only when at least one input is low
D) only when all the inputs are high

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All 30 questions and answers are available in the Quiz. 1. 