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 12 of 117

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Q111.
The simplified logic expression for the circuit of the given figure is

a.

Y = A

b.

Y = AB

c.

Y = A + B

d.

Y = A̅ + B

Discuss
Answer: (a).Y = A
Q112.
DeMorgan's first theorem is =

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q113.
Consider the following digital circuits:

1. Multipliers
2. Read only memories
3. D-latch
4. Circuits as shown in figure

Which of these come under the class of combinational circuit?

a.

1 and 2

b.

3 and 4

c.

1, 2 and 3

d.

1, 2, 3 and 4

Discuss
Answer: (a).1 and 2
Q114.
The open wired circuit in the given figure works as a

a.

EX - NOR gate

b.

AND gate

c.

XOR gate

d.

NOR gate

Discuss
Answer: (c).XOR gate
Q115.
The circuit shown below is functionally equivalent to

a.

NOR gate

b.

OR gate

c.

EX-OR gate

d.

NAND gate

Discuss
Answer: (c).EX-OR gate
Q116.
The clock shown in figure has a frequency of 6 MHz. The frequency of the Q output will be

a.

12 MHz

b.

24 MHz

c.

3 MHz

d.

1.5 MHz

Discuss
Answer: (c).3 MHz
Q117.
If all bubbles are removed, what are the new RAM locations?

The 8156 of a figure has RAM locations from 2000 H to 20 FFH.

a.

(8000)H - (83FF)H

b.

(80AA)H - (80FF)H

c.

(FF00)H - (FFFF)H

d.

none of the above

Discuss
Answer: (c).(FF00)H - (FFFF)H
Q118.
The logic operations of the two circuits given below are

a.

complementary

b.

identical

c.

entirely different

d.

none of these

Discuss
Answer: (c).entirely different
Q119.
A 3 stage Johnson counter (ring) shown in figure is clocked at a constant frequency of fc from the starting state of Q₀ Q₁ Q₂ = 101. The frequency of output Q₀ Q₁ Q₂ will be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q120.
In the given figure shows a 3 bit shift register using TTL flip flops. Initially all the flip flops are set to 0 state. After 8 clock pulses

a.

A = 1, B = 1, C = 1

b.

A = 1, B = 1, C = 0

c.

A = 0, B = 1, C = 1

d.

A = 0, B = 0, C = 1

Discuss
Answer: (a).A = 1, B = 1, C = 1
Page 12 of 117