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 55 of 117

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Q541.
In 8085 microprocessor, what is the memory word size?

a.

6 bits

b.

8 bits

c.

12 bits

d.

16 bits

Discuss
Answer: (a).6 bits
Q542.
Which of the following memory is preferred in case of calculators?

a.

Dynamic RAM

b.

Dynamic ROM

c.

Static ROM

d.

Static RAM

Discuss
Answer: (a).Dynamic RAM
Q543.
Which device changes parallel data to serial data?

a.

Decoder

b.

Multiplexer

c.

Demultiplexer

d.

Flip flop

Discuss
Answer: (b).Multiplexer
Q544.
A 12 bit ADC is employed to convert an analog voltage of zero to 10 volts. The resolution of the ADC is

a.

2.44 mV

b.

24.4 mV

c.

83.3 mV

d.

1.2 V

Discuss
Answer: (a).2.44 mV
Q545.
Race condition always arises in

a.

synchronous circuit

b.

asynchronous circuit

c.

combinational circuit

d.

digital circuit

Discuss
Answer: (b).asynchronous circuit
Q546.
The number of flip-flops required to build a mod-19 counter is

a.

4

b.

5

c.

6

d.

7

Discuss
Answer: (c).6
Q547.
The number of flip-flops needed to divide the input frequency by 32 is

a.

2

b.

4

c.

5

d.

16

Discuss
Answer: (c).5
Q548.
Given two numbers A and B in sign magnitude representation in an eight bit format A = 00011110 and B = 10011100 then A ๊šš B gives

a.

10000010

b.

00011111

c.

10011101

d.

11100001

Discuss
Answer: (a).10000010
Q549.
The 8086 arithmetic instruction work on

1. signed and unsigned numbers
2. ASCII data
3. unpacked BCD data

Select the correct answer using the codes given below :

a.

1 and 2

b.

1 and 3

c.

2 and 3

d.

1, 2 and 3

Discuss
Answer: (c).2 and 3
Q550.
The expression Y (A, B, C) = โˆ‘m (1, 3, 5, 6) is to realized using a multiplexer. Then

a.

use 8 : 1 multiplexer and ground input lines 1, 3, 5, 6

b.

use 8 : 1 multiplexer and ground input lines 0, 2, 4, 7

c.

use 8 : 1 multiplexer and ground input lines 0, 1, 2, 3

d.

use 8 : 1 multiplexer and ground input lines 4, 5, 6, 7

Discuss
Answer: (b).use 8 : 1 multiplexer and ground input lines 0, 2, 4, 7
Page 55 of 117