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 41 of 117

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Q401.
Assertion (A): It is possible that a digital circuit gives the same output for different input voltages

Reason (R): A digital circuit is also called logic circuit.

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: (b).Both A and R are correct but R is not correct explanation of A
Q402.
In a ring counter for N clock pulses the scale for the counter is

a.

N : 1

b.

N : 2

c.

N : 10

d.

N : 100

Discuss
Answer: (a).N : 1
Q403.
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after XRA A?

a.

A 6 H, 1

b.

A 6 H, 0

c.

00 H, 0

d.

00 H, 1

Discuss
Answer: (c).00 H, 0
Q404.
2's complement of (-24) =

a.

11101000

b.

01001000

c.

01111111

d.

00111111

Discuss
Answer: (a).11101000
Q405.
An index register in digital computer is a register to be used for

a.

performing arithmetic and logic operations

b.

temporary storage of result

c.

counting number of times a program is executed

d.

address modification purpose

Discuss
Answer: (d).address modification purpose
Q406.
Assuming accumulator contain A 64 and the carry is set (1). What will register A and carry (CY) contain after ORA A?

a.

A 6 H, 1

b.

A 6 H, 0

c.

00 H, 0

d.

00 H, 1

Discuss
Answer: (b).A 6 H, 0
Q407.
2's complement of a given 3 or more bit number of non-zero magnitude is the same as the original number if all bits except

a.

MSB are zero

b.

LSB are zero

c.

MSB are 1

d.

LSB are 1

Discuss
Answer: (a).MSB are zero
Q408.
A half adder adds __________ bits and a full adder adds __________ bits.

a.

two, three

b.

three, four

c.

four, six

d.

two, four

Discuss
Answer: (a).two, three
Q409.
If noise margin is high, there is lesser chance of false operation.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q410.
Decimal 1932 when converted into 10's complement will become

a.

8868

b.

8068

c.

8608

d.

8806

Discuss
Answer: (b).8068
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