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Welcome to the Digital Logic Circuits MCQs Page

Dive deep into the fascinating world of Digital Logic Circuits with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Digital Logic Circuits, a crucial aspect of Computer Architecture. In this section, you will encounter a diverse range of MCQs that cover various aspects of Digital Logic Circuits, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Computer Architecture.

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Check out the MCQs below to embark on an enriching journey through Digital Logic Circuits. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Computer Architecture.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Digital Logic Circuits. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Digital Logic Circuits MCQs | Page 2 of 11

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Q11.
Which of the following statements is wrong ?

a.

Propagation delay is the time required for a gate to change its state

b.

Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state

c.

Fan-in of a gate is always equal to fan-out of the same gate

d.

Operating speed is the maximum frequency at which digital data can be applied to a gate

Discuss
Answer: (c).Fan-in of a gate is always equal to fan-out of the same gate
Q12.
Which of the following expressions is not equivalent to X ' ?

a.

X NAND X

b.

X NOR X

c.

X NAND 1

d.

X NOR 1

Discuss
Answer: (d).X NOR 1
Q13.
The EXCLUSIVE NOR gate is equivalent to which gate followed by an inverter ?

a.

OR

b.

AND

c.

NAND

d.

XOR

Discuss
Answer: (d).XOR
Q14.
A one-to-four line demultiplexer is to be implemented using a memory. How many bits must each word have ?

a.

1 bit

b.

2 bits

c.

4 bits

d.

8 bits

Discuss
Answer: (a).1 bit
Q15.
What logic function is produced by adding an inverter to the output of an AND gate ?

a.

NAND

b.

NOR

c.

XOR

d.

OR

Discuss
Answer: (a).NAND
Q16.
Which of the following gates is known as coincidence detector ?

a.

AND gate

b.

OR gate

c.

NOT gate

d.

NAND gate

Discuss
Answer: (a).AND gate
Q17.
Which table shows the logical state of a digital circuit output for every possible combination of logical states in the inputs ?

a.

Function table

b.

Truth table

c.

Routing table

d.

ASCII table

Discuss
Answer: (b).Truth table
Q18.
A positive AND gate is also a negative

a.

NAND gate

b.

NOR gate

c.

AND gate

d.

OR gate

Discuss
Answer: (d).OR gate
Q19.
A demultiplexer is used to

a.

Route the data from single input to one of many outputs

b.

Perform serial to parallel conversion

c.

Both a & b

d.

Select data from several inputs and route it to single output

Discuss
Answer: (c).Both a & b
Q20.
An OR gate can be imagined as

a.

Switches connected in series

b.

Switches connected in parallel

c.

MOS transistors connected in series

d.

None of these

Discuss
Answer: (b).Switches connected in parallel
Page 2 of 11

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