Digital Electronics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Digital Electronics, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Digital Electronics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Digital Electronics mcq questions that explore various aspects of Digital Electronics problems. Each MCQ is crafted to challenge your understanding of Digital Electronics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Digital Electronics MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Digital Electronics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Digital Electronics knowledge to the test? Let's get started with our carefully curated MCQs!

Digital Electronics MCQs | Page 2 of 117

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Q11.
A device which converts BCD to seven segment is called

a.

encoder

b.

decoder

c.

multiplexer

d.

none of these

Discuss
Answer: (b).decoder
Q12.
In 2's complement representation the number 11100101 represents the decimal number

a.

+37

b.

-31

c.

+27

d.

-27

Discuss
Answer: (d).-27
Q13.
A decade counter skips

a.

binary states 1000 to 1111

b.

binary states 0000 to 0011

c.

binary states 1010 to 1111

d.

binary states 1111 to higher

Discuss
Answer: (c).binary states 1010 to 1111
Q14.
BCD input 1000 is fed to a 7 segment display through a BCD to 7 segment decoder/driver. The segments which will lit up are

a.

a, b, d

b.

a, b, c

c.

all

d.

a, b, g, c, d

Discuss
Answer: (c).all
Q15.
For the K map of the given figure, the simplified Boolean expression is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q16.
In the given figure shows a 4 bit serial in parallel out right shift register. The initial contents as shown are 0110. After 3 clock pulses the contents will be

a.

0000

b.

0101

c.

1010

d.

1111

Discuss
Answer: (c).1010
Q17.
The circuit of the given figure is

a.

full adder

b.

full subtractor

c.

shift register

d.

decade counter

Discuss
Answer: (b).full subtractor
Q18.
In the given figure, A = B = 1 and C = D = 0. Then Y =

a.

1

b.

0

c.

either 1 or 0

d.

indeterminate

Discuss
Answer: (b).0
Q19.
The gates G1 and G2 in the figure have propagation delays of 10 n sec. and 20 n sec. respectively. If the input Vi makes an output change from logic 0 to 1 at time t = t₀ then the output wavefrom V₀ is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q20.
The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is

a.

4

b.

5

c.

6

d.

8

Discuss
Answer: (a).4
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