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 88 of 117

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Q871.
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)
Q872.
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
Q873.
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
Q874.
If we need a low noise device, we should use

a.

BJT

b.

FET

c.

thyristor

d.

UJT

Discuss
Answer: (b).FET
Q875.
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
Q876.
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
Q877.
Which of the following bus is used to transfer data from main memory to peripheral device?

a.

DMA bus

b.

Output bus

c.

Input bus

d.

Data bus

Discuss
Answer: (a).DMA bus
Q878.
Assertion (A): The output of an 8 bit ADC is 80 H if input is 2.5 V

Reason (R): ADC has an output range of 00 to FF H if input range is - 5 to + 5 V

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: (c).A is true, R is false
Q879.
A parity detector can detect

a.

single error only

b.

single error or odd number of errors

c.

two errors

d.

single or two errors

Discuss
Answer: (b).single error or odd number of errors
Q880.
Which of the- following display consumes least amount of power?

a.

LCD

b.

LED

c.

Fluorescent display

d.

All display consume same power

Discuss
Answer: (a).LCD
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