Free Printable Digital Electronics - 100 MCQs with Answers

1.

The basic building block of digital circuits is:

a)

Diode

b)

Transistor

c)

Logic Gate

d)

Resistor

2.

The binary equivalent of decimal 10 is:

a)

1001

b)

1010

c)

1100

d)

1111

3.

A logic gate that produces a HIGH output when all inputs are LOW is:

a)

OR

b)

AND

c)

NOR

d)

XOR

4.

The full adder has how many inputs and outputs?

a)

2 inputs, 1 output

b)

3 inputs, 2 outputs

c)

3 inputs, 1 output

d)

2 inputs, 2 outputs

5.

The flip-flop is a:

a)

Combinational circuit

b)

Sequential circuit

c)

Amplifier

d)

Comparator

6.

The hexadecimal equivalent of binary 1111 is:

a)

E

b)

F

c)

D

d)

C

7.

A multiplexer is used for:

a)

Data storage

b)

Data transmission

c)

Selecting one input from many

d)

Performing arithmetic

8.

The output of an XOR gate is HIGH when:

a)

Both inputs are HIGH

b)

Both inputs are LOW

c)

Inputs are different

d)

Inputs are same

9.

Which of the following is a universal gate?

a)

AND

b)

OR

c)

XOR

d)

NAND

10.

The function of a decoder is to:

a)

Encode data

b)

Convert binary to decimal

c)

Convert n inputs to 2ⁿ outputs

d)

Perform arithmetic

11.

Sample question 11:

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Option 1

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Sample question 17:

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Sample question 68:

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69.

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70.

Sample question 70:

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Sample question 71:

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Sample question 72:

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Sample question 73:

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Sample question 74:

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Sample question 75:

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Sample question 76:

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Sample question 77:

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78.

Sample question 78:

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Sample question 79:

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80.

Sample question 80:

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81.

Sample question 81:

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82.

Sample question 82:

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83.

Sample question 83:

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84.

Sample question 84:

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85.

Sample question 85:

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86.

Sample question 86:

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87.

Sample question 87:

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88.

Sample question 88:

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89.

Sample question 89:

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90.

Sample question 90:

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91.

Sample question 91:

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92.

Sample question 92:

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93.

Sample question 93:

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Sample question 94:

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95.

Sample question 95:

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Sample question 96:

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97.

Sample question 97:

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98.

Sample question 98:

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99.

Sample question 99:

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100.

Sample question 100:

a)

Option 1

b)

Option 2

c)

Option 3

d)

Option 4

Digital Electronics - 100 MCQs with Answers

Total questions: 100

Worksheet time: 50mins

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