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 13 of 117

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Q121.
Figure shows an 8-bit LED display. A light circle means that a LED is ON (binary 1) and a dark circle means a LED is OFF (binary 0). What is the decimal equivalent of the binary number displayed?

a.

100

b.

121

c.

144

d.

172

Discuss
Answer: (d).172
Q122.
Which type of gate is in the given figure?

a.

NOR

b.

OR

c.

NAND

d.

EX-OR

Discuss
Answer: (d).EX-OR
Q123.
Given figure is the voltage transfer characteristic of

a.

an N MOS inverter with enhanced mode transistor as load

b.

an N MOS inverter with depletion mode transistor as load

c.

a CMOS inverter

d.

BJT inverter

Discuss
Answer: (c).a CMOS inverter
Q124.
An 8-bit microprocessor has 16 bit address bus A₀ - A₁₅. The processor addresses a 1-K byte memory chip as shown. The address range for the chip is

a.

(F00F)H TO (F40E)H

b.

(F000)H TO (F3FF)H

c.

(F100)H TO (F4FF)H

d.

(F700)H TO (FAFF)H

Discuss
Answer: (b).(F000)H TO (F3FF)H
Q125.
The circuit shown in the figure is a

a.

positive logic OR circuit

b.

negative logic OR circuit

c.

positive logic AND circuit

d.

negative logic AND circuit

Discuss
Answer: (a).positive logic OR circuit
Q126.
For the circuit shown in the figure, what is the frequency of the output Q?

a.

Twice the input clock frequency

b.

Half the input clock frequency

c.

Same as input clock frequency

d.

Inverse of the propagation delay of the FF

Discuss
Answer: (b).Half the input clock frequency
Q127.
Figure shows three pulse train inputs to a 3-input OR gate. Assuming positive logic, the output pulse rate train in figure (b) would be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q128.
For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is given by

a.

A + (B + C) D

b.

A + BC + D

c.

A(BC + D)

d.

none of these

Discuss
Answer: (c).A(BC + D)
Q129.
If number of bits is N, the % resolution in analog to digital conversion is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q130.
Examine the following truth table. The product of sum from this truth table is

a.

(X̅ + Y̅) (X + Y)

b.

(X + Y̅) (X̅ + Y̅)

c.

(X̅ + Y) (X̅ + Y̅)

d.

(X + Y̅) (X + Y)

Discuss
Answer: (d).(X + Y̅) (X + Y)
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