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 15 of 117

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Q141.
The contents of stack location 2109 H after the call operation will be

a.

00001111

b.

01010101

c.

00100000

d.

00100010

Discuss
Answer: (c).00100000
Q142.
For the logic circuit shown in figure, the simplified Boolean expression for the output Y is

a.

A + B + C

b.

AB

c.

B

d.

C

Discuss
Answer: (b).AB
Q143.
In the given figure assume that initially Q = 1 with Clock Pulses being given, the subsequent states of Q will be

a.

1, 0, 1, 0, 1......

b.

0, 0, 0, 0, 0......

c.

1, 1, 1, 1, 1......

d.

0, 1, 0, 1, 0......

Discuss
Answer: (c).1, 1, 1, 1, 1......
Q144.
In the circuit shown below, the outputs Y1 and Y2 for the given initial condition Y1 = Y2 = 1 and after four input pulses will be

a.

Y1 = 1, Y2 = 0

b.

Y1 = 0, Y2 = 0

c.

Y1 = 0, Y2 = 1

d.

Y1 = 1, Y2 = 1

Discuss
Answer: (d).Y1 = 1, Y2 = 1
Q145.
For the logic circuit of the given figure the simplified Boolean expression is

a.

Y = AB + Aฬ… C

b.

Y = (AB) (Aฬ… C)

c.

Y = ABC

d.

Y = A Bฬ… + Aฬ… C

Discuss
Answer: (a).Y = AB + Aฬ… C
Q146.
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
Q147.
A device which converts BCD to seven segment is called

a.

encoder

b.

decoder

c.

multiplexer

d.

none of these

Discuss
Answer: (b).decoder
Q148.
In 2's complement representation the number 11100101 represents the decimal number

a.

+37

b.

-31

c.

+27

d.

-27

Discuss
Answer: (d).-27
Q149.
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
Q150.
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
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