# Digital Electronics and Logic Design Solved MCQs

1.

A. 111100
B. 110110
C. 110111
D. 1011
2.

A. a ex-nor b
B. a ex or b
C. (a+b)a
D. (a+b)b
3.

A. 3f2.89
B. 3f2.98
C. 2f3.89
D. 2f3.98
4.

## A three input NOR gate gives logic high output only when

A. one input is high
B. one input is low
C. two input are low
D. all input are low
Answer» D. all input are low
5.

## The absorption law in Boolean algebra say that

A. x + x = x
B. x . y = x
C. x + x . y = x
D. none of the above
Answer» C. x + x . y = x
6.

A. aacb
B. 0
C. abcd
D. ffff
7.

A. 22
B. 22.2
C. 20.2
D. 27.5
8.

## The negative numbers in the binary system can be represented by

A. sign magnitude
B. 2\s complement
C. 1\s complement
D. all of the above
9.

## Negative numbers cannot be represented in

A. signed magnitude form
B. 1’s complement form
C. 2’s complement form
D. none of the above
Answer» D. none of the above
10.

A. 150
B. 241
C. 142
D. 1.01e+08
11.

A. 82f.027
B. 82f.014
C. 82f.937
D. 83f.014
12.

A. 0
B. 1
C. 10
D. 11
13.

A. bit
B. character
C. number
D. byte
14.

A. 101110000
B. 110110000
C. 111010000
D. 1.11e+08
15.

A. 11110111
B. 11100111
C. 110001101
D. 10111011 1
16.

A. 1111101000
B. 1101101000
C. 1101111000
D. 1.11e+09
17.

A. 1111110111
B. 1111000111
C. 1111110011
D. 1.11e+09
18.

A. 1101
B. 1010
C. 1111
D. 1110
19.

A. 6793
B. 6739
C. 6973
D. 6379
20.

A. c 1 d
B. d c 1
C. 1 c d
D. 1 d c
21.

A. 0
B. 1
C. a
D. bc
22.

A. 80
B. 256
C. 100
D. 160
23.

A. a + b
B. a\.b
C. (a + b)\
D. a.b
24.

A. 101110
B. 111110
C. 110010
D. 10011