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 5 of 117

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Q41.
The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counter is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q42.
In the figure, the LED

a.

emits light when both S1 and S2 are closed

b.

emits light when both S1 and S2 are open

c.

emits light when only S1 and S2 is closed

d.

does not Emit light, irrespective of the switched positions

Discuss
Answer: (d).does not Emit light, irrespective of the switched positions
Q43.
Four inputs A, B, C, D are fed to a NOR gate. The output of NOR gate is fed to an inverter. The output of inverter is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q44.
The circuit in the figure is has two CMOS-NOR gates. This circuit functions as a

a.

flip-flop

b.

schmitt trigger

c.

monostable multivibrator

d.

astable multivibrator

Discuss
Answer: (c).monostable multivibrator
Q45.
In the TTL circuit in the figure, Sโ‚‚ to Sโ‚€ are select lines and Xโ‚‡ to Xโ‚€ are input lines. Sโ‚€ and Xโ‚€ are LSBs. The output Y is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q46.
The Boolean expression for the shaded area in the Venn diagram is

a.

Xฬ… + Yฬ… + Z

b.

XYฬ… + Z + Xฬ… YZ

c.

Xฬ… Yฬ… Z + XY

d.

X + Y + Z

Discuss
Answer: (c).Xฬ… Yฬ… Z + XY
Q47.
The logic realized by the circuit shown in figure below is

a.

F = A - C

b.

F = A + C

c.

F = B โŠ™ C

d.

F = B โŠ• C

Discuss
Answer: (d).F = B โŠ• C
Q48.
The inputs A and B of the given figure are applied to a two input NOR gate. The output waveform is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q49.
In the circuit of the given figure, Vโ‚€ =

a.

5 V

b.

3.1 V

c.

2.5 V

d.

0

Discuss
Answer: (a).5 V
Q50.
In following figure, the initial contents of the 4-bit serial in parallel out, right shift, shift register as shown in figure are 0110. After 3 clock pulses the contents of the shift register will be

a.

0000

b.

0101

c.

1010

d.

1110

Discuss
Answer: (c).1010
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