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 4 of 117

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Q31.
In the given figure RC = RL = 1 kฮฉ, then V0 =

a.

5 V

b.

2.5 V

c.

1 V

d.

0 V

Discuss
Answer: (b).2.5 V
Q32.
Assertion (A): Gate triggering is the most commonly used method for triggering of an SCR.

Reason (R): Even a small gate current is sufficient to turn on an SCR.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q33.
A device which converts BCD to seven segment is called

a.

encoder

b.

decoder

c.

multiplexer

d.

none of these

Discuss
Answer: (b).decoder
Q34.
In 2's complement representation the number 11100101 represents the decimal number

a.

+37

b.

-31

c.

+27

d.

-27

Discuss
Answer: (d).-27
Q35.
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
Q36.
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
Q37.
Inputs A and B of the given figure are applied to a NAND gate. The output is LOW

a.

from 0 to 6

b.

from 0 to 2

c.

from 0 to 1 and 2 to 3

d.

from 1 to 2 and 3 to 4

Discuss
Answer: (c).from 0 to 1 and 2 to 3
Q38.
For the NMOS gate in the given figure, F =

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q39.
The logic circuit of the given figure is equivalent to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q40.
In the given figure shows a logic circuit. The minimum Boolean expression for this circuit is

a.

A + B

b.

A + B + C

c.

AB + C

d.

AB + AC + BC

Discuss
Answer: (b).A + B + C
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