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 31 of 117

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Q301.
In the 8421 BCD code, the decimal number 125, is written as

a.

1111101

b.

0001 0010 0101

c.

7 D

d.

none of these

Discuss
Answer: (a).1111101
Q302.
110.11โ‚‚ x 110โ‚‚ = __________ โ‚โ‚€

a.

40.5

b.

30.5

c.

20.5

d.

10.5

Discuss
Answer: (a).40.5
Q303.
Y = A + Aฬ… B is the same as

a.

Y = AB

b.

Y = A + B

c.

Y = Aฬ… + Bฬ…

d.

Y = Aฬ… + B

Discuss
Answer: (b).Y = A + B
Q304.
Assertion (A): Different symbols are used for different gates

Reason (R): IEEE symbols are the same as traditional symbols for gates.

a.

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

b.

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

c.

A is true, R is false

d.

A is false, R is true

Discuss
Answer: (c).A is true, R is false
Q305.
If an analog voltage is expressed in binary using 4 bits, each successive binary count would represent

a.

1/2 of total voltage

b.

1/4 of total voltage

c.

1/15 of total voltage

d.

1/16 of total voltage

Discuss
Answer: (c).1/15 of total voltage
Q306.
In a 4 input AND gate, the total number of High outputs for 16 input states are

a.

16

b.

8

c.

4

d.

1

Discuss
Answer: (d).1
Q307.
Symmetrical square wave of time period 100 ฮผs can be obtained from square wave of time period 10 ฮผs by using

a.

divide by 5 circuit

b.

divide by 2 circuit

c.

divide by 5 circuit followed by divide by 2 circuit

d.

BCD counter

Discuss
Answer: (c).divide by 5 circuit followed by divide by 2 circuit
Q308.
The initial state of a Mod-16 counter is 0110. After 37 clock pulses the state of counter will be

a.

1011

b.

0110

c.

010

d.

0001

Discuss
Answer: (a).1011
Q309.
In a 5 x 7 dot matrix, format, to store 64 alphanumeric characters we require

a.

1120 bits

b.

2240 bits

c.

33 bits

d.

64 bits

Discuss
Answer: (b).2240 bits
Q310.
A digital system is required to amplify a binary encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary is,

a.

8

b.

6

c.

5

d.

7

Discuss
Answer: (d).7
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