Digital Communication Fundamentals MCQs

Practice Digital Communication Fundamentals MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Communication SystemsDigital Communication Fundamentals

A binary digital communication system transmits 24000 bits in 3 seconds. Its bit rate is?

A8 kbps
B12 kbps
C24 kbps
D72 kbps

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Correct Answer: A. 8 kbps

Explanation: Bit rate = number of bits/time = 24000/3 = 8000 bit/s = 8 kbps.

Reference: Standard communication systems: digital communication fundamentals

Question 2

Communication SystemsDigital Communication Fundamentals

The term baud refers to the number of?

ABits transmitted per second in every case
BSymbols transmitted per second
CBytes transmitted per second
DCarrier cycles per bit only

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Correct Answer: B. Symbols transmitted per second

Explanation: Baud is the symbol rate. It equals bit rate only when each symbol represents one bit.

Reference: Standard communication systems: digital communication fundamentals

Question 3

Communication SystemsDigital Communication Fundamentals

A digital modulation scheme carries 3 bits per symbol at 10 kbaud. Its bit rate is?

A3.33 kbps
B10 kbps
C30 kbps
D80 kbps

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Correct Answer: C. 30 kbps

Explanation: Rb = Rs × bits/symbol = 10 kbaud × 3 = 30 kbps.

Reference: Standard communication systems: digital communication fundamentals