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 99 of 117

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Q981.
For the logic circuit shown in figure, the simplified Boolean expression for the output Y is

a.

A + B + C

b.

AB

c.

B

d.

C

Discuss
Answer: (b).AB
Q982.
In the given figure assume that initially Q = 1 with Clock Pulses being given, the subsequent states of Q will be

a.

1, 0, 1, 0, 1......

b.

0, 0, 0, 0, 0......

c.

1, 1, 1, 1, 1......

d.

0, 1, 0, 1, 0......

Discuss
Answer: (c).1, 1, 1, 1, 1......
Q983.
In the circuit shown below, the outputs Y1 and Y2 for the given initial condition Y1 = Y2 = 1 and after four input pulses will be

a.

Y1 = 1, Y2 = 0

b.

Y1 = 0, Y2 = 0

c.

Y1 = 0, Y2 = 1

d.

Y1 = 1, Y2 = 1

Discuss
Answer: (d).Y1 = 1, Y2 = 1
Q984.
For the logic circuit of the given figure the simplified Boolean expression is

a.

Y = AB + Aฬ… C

b.

Y = (AB) (Aฬ… C)

c.

Y = ABC

d.

Y = A Bฬ… + Aฬ… C

Discuss
Answer: (a).Y = AB + Aฬ… C
Q985.
In DTL the junction transistor serves as

a.

inverter

b.

buffer amplifier

c.

both (a) and (b)

d.

none of the above

Discuss
Answer: (c).both (a) and (b)
Q986.
A 16 x 8 ROM stores these words in its first four locations, as given below. Which of this represents 3 CH in hexadecimal?

a.

R0 = 1110 0010

b.

R1 = 0101 0111

c.

R2 = 0011 1100

d.

R3 = 1011 1111

Discuss
Answer: (c).R2 = 0011 1100
Q987.
Decade counter has 4 flip flops and skips states 10 to 15.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q988.
If we need a low noise device, we should use

a.

BJT

b.

FET

c.

thyristor

d.

UJT

Discuss
Answer: (b).FET
Q989.
The principal of locality of reference justifies the use of

a.

interrupts

b.

DMA

c.

virtual memory

d.

cache memory

Discuss
Answer: (d).cache memory
Q990.
The contents of the commands register are 23 H. Then port C

a.

is an input port

b.

is an output port

c.

is both input as well as output port

d.

none of the above

Discuss
Answer: (a).is an input port
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