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 6 of 117

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Q51.
The number of distinct Boolean expression of 4 variables is

a.

16

b.

256

c.

1024

d.

65536

Discuss
Answer: (d).65536
Q52.
The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

a.

000110

b.

0010

c.

1111

d.

011101

Discuss
Answer: (a).000110
Q53.
A memory system of size 16 k bytes is to be designed using memory chips which have 12 address lines and 4 data lines each. The number of such chips required to design the memory system is

a.

2

b.

4

c.

8

d.

18

Discuss
Answer: (c).8
Q54.
In a 7 segment display, LEDs b and c lit up. The decimal number displayed is

a.

9

b.

7

c.

3

d.

1

Discuss
Answer: (d).1
Q55.
A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is

a.

2.44 mV

b.

24.4 mV

c.

1.2 V

d.

none of the above

Discuss
Answer: (a).2.44 mV
Q56.
A full adder can be made out of

a.

two half adders

b.

two half adders and a OR gate

c.

two half adders and a NOT gate

d.

three half adders

Discuss
Answer: (b).two half adders and a OR gate
Q57.
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
Q58.
For the logic circuit of the given figure, the minimized expression is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q59.
The inputs to a NAND gate are as shown in the given figure. The waveform of output is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q60.
In the given figure A = 1, B = 1. B is now changed to a sequence 101010................The outputs X and Y will be

a.

fixed at 0 and 1 respectively

b.

X = 1010.......and Y = 0101........

c.

X = 1010..........and Y = 1010

d.

fixed at 1 and 0 respectively

Discuss
Answer: (a).fixed at 0 and 1 respectively
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