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 52 of 117

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Q511.
The ASCII code is

a.

5-bit code

b.

7-bit code

c.

9-bit code

d.

11-bit code

Discuss
Answer: (b).7-bit code
Q512.
The binary addition 1 + 1 =

a.

11

b.

10

c.

111

d.

100

Discuss
Answer: (b).10
Q513.
The Boolean function A + BC is a reduced form of

a.

AB + BC

b.

(A + B) . (A + C)

c.

Aฬ…B + ABฬ…C

d.

(A + C) . B

Discuss
Answer: (c).Aฬ…B + ABฬ…C
Q514.
Which of the following statements is not true in regard to storage time of a transistor?

a.

The transistor is in active region

b.

Both junctions are forward-biased

c.

The collector injects electrons or holes into the base region

d.

It is the time taken by the carriers to leave the base region

Discuss
Answer: (a).The transistor is in active region
Q515.
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
Q516.
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
Q517.
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
Q518.
2's complement of (-24) =

a.

11101000

b.

01001000

c.

01111111

d.

00111111

Discuss
Answer: (a).11101000
Q519.
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
Q520.
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
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