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 20 of 117

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Q191.
FFโ‚โ‚† when converted to 8421BCD =

a.

0000 0101 0101

b.

0010 0101 0101

c.

1111 0101 0101

d.

1000 0101 0101

Discuss
Answer: (b).0010 0101 0101
Q192.
ECL has high switching speed because the transistors are

a.

switching between cutoff and saturation regions

b.

switching between cutoff and active regions

c.

switching between active and saturation regions

d.

none of the above

Discuss
Answer: (b).switching between cutoff and active regions
Q193.
Karnaugh map can not be drawn when the number of variables is more than 4

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q194.
A dynamic RAM cell which holds 5 V has to be refreshed every 20 ms so that the stored voltage does not fall by more than 0.5 V. If the cell has a constant discharge current of 0.1 pA, the storage capacitance of cell is

a.

4 x 10โ€พโถ F

b.

4 x 10โ€พโน F

c.

4 x 10โ€พ¹² F

d.

4 x 10โ€พ¹โต F

Discuss
Answer: (d).4 x 10โ€พ¹โต F
Q195.
If memory chip size is 256 x 1 bits, the number of chips required to make 1 k byte memory is

a.

8

b.

12

c.

24

d.

32

Discuss
Answer: (d).32
Q196.
Computers use RC circuit for edge triggering.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q197.
The function Y = AC + BD + EF is

a.

POS

b.

SOP

c.

Hybrid

d.

none of the above

Discuss
Answer: (b).SOP
Q198.
Assertion (A): A multiplexer can be used for data routing.

Reason (R): A multiplexer has one input and many outputs.

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
Q199.
TTL is used in electronic calculators.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q200.
Inverter 74 LS04 has following specifications I0H max = - 0.4 mA, I0L max = 8 mA, IIH max = 20 ฮผA, IIL max = 0.1 mAThe fan out of this inverter is

a.

10

b.

20

c.

60

d.

100

Discuss
Answer: (b).20
Page 20 of 117