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 8 of 117

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Q71.
The characteristic equation of flip-flop gives the next state QN + 1 in terms of present state QN and the inputs. Which one of the following is the characteristic equation of J - K flip-flop?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q72.
The characteristic equation for the next state (Qn+1) of a J-K flip-flop is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q73.
Symbol in the given figure is IEEE symbol for

a.

AND

b.

OR

c.

NAND

d.

NOR

Discuss
Answer: (b).OR
Q74.
For the logic circuit of the given figure, Y =

a.

A + BC

b.

BC

c.

AB

d.

AB + C

Discuss
Answer: (c).AB
Q75.
The circuit realizes the function

a.

(A + B) E + CD

b.

(A + B) (E + CD)

c.

(A + B) (E + C + D)

d.

(AB + E). CD

Discuss
Answer: (a).(A + B) E + CD
Q76.
Which of the following is coincidence logic circuit?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q77.
The circuit of the given figure performs

a.

OR function

b.

AND function

c.

exclusive OR function

d.

exclusive NOR function

Discuss
Answer: (b).AND function
Q78.
Figure given below shows the internal schematic of a TTL AND-OR Invert (AOI) gate, For the input shown in the given figure, the output Y is

a.

0

b.

1

c.

AB

d.

AB

Discuss
Answer: (a).0
Q79.
The circuit show in the figure has 4 boxes each described by inputs P, Q, R and outputs y, z with

Y = P Ꚛ Q Ꚛ R, Z = RQ + P̅R + QP̅. The circuit act as a

a.

4 bit adder giving P + Q

b.

4 bit subtractor P - Q

c.

4 bit subtractor Q - P

d.

4 bit adder P + Q + R

Discuss
Answer: (b).4 bit subtractor P - Q
Q80.
The MOS symbol shown indicates that

1. It is depletion type
2. It is enhancement type
3. It is channel
4. It is P-channel
5. Electrons flow from s to D
6. Holes flow from D to s

The true statements are

a.

1, 3, 6

b.

1, 3, 5

c.

2, 4, 6

d.

2, 3, 5

Discuss
Answer: (d).2, 3, 5
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