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Welcome to the Physical Layer MCQs Page

Dive deep into the fascinating world of Physical Layer with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Physical Layer, a crucial aspect of Networking. In this section, you will encounter a diverse range of MCQs that cover various aspects of Physical Layer, 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 Networking.

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Check out the MCQs below to embark on an enriching journey through Physical Layer. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Networking.

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

Physical Layer MCQs | Page 10 of 24

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Q91.
The _____ scheme uses data patterns of size 2 and encodes the 2-bit patterns as one signal element belonging to a four-level signal.

a.

4B5B

b.

2B1Q

c.

MLT-3

d.

none of the above

Discuss
Answer: (b).2B1Q
Q92.
The ______ scheme uses three levels (+V, 0, and -V) and three transition rules to move between the levels.

a.

4B5B

b.

2B1Q

c.

MLT-3

d.

none of the above

Discuss
Answer: (c).MLT-3
Q93.
______ substitutes eight consecutive zeros with 000VB0VB.

a.

B4B8

b.

HDB3

c.

B8ZS

d.

none of the above

Discuss
Answer: (c).B8ZS
Q94.
______ substitutes four consecutive zeros with 000V or B00V.

a.

B4B8

b.

HDB3

c.

B8ZSf

d.

none of the above

Discuss
Answer: (b).HDB3
Q95.
ASK, PSK, FSK, and QAM are examples of ________ conversion.

a.

digital-to-digital

b.

digital-to-analog

c.

analog-to-analog

d.

analog-to-digital

Discuss
Answer: (b).digital-to-analog
Q96.
AM and FM are examples of ________ conversion.

a.

digital-to-digital

b.

digital-to-analog

c.

analog-to-analog

d.

analog-to-digital

Discuss
Answer: (c).analog-to-analog
Q97.
In QAM, both ________ of a carrier frequency are varied.

a.

frequency and amplitude

b.

phase and frequency

c.

amplitude and phase

d.

none of the above

Discuss
Answer: (c).amplitude and phase
Q98.
If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps.

a.

100

b.

400

c.

800

d.

1600

Discuss
Answer: (c).800
Q99.
If the bit rate for an ASK signal is 1200 bps, the baud rate is ________.

a.

300

b.

400

c.

600

d.

1200

Discuss
Answer: (d).1200
Q100.
If the bit rate for an FSK signal is 1200 bps, the baud rate is ________.

a.

300

b.

400

c.

600

d.

1200

Discuss
Answer: (d).1200
Page 10 of 24

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