Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 40
Q521:
How many bits are needed per level if a digital signal has 2 levels?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
A
Chapter: 40
Q522:
The number of bits needed per level for a digital signal with 4 levels is _______.
A. 1
B. 2
C. 3
D. 4
Correct Answer:
B
Chapter: 40
Q523:
If a digital signal has 8 levels, how many bits are needed per level?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
C
Chapter: 40
Q524:
How many bits are needed per level if a digital signal has 9 levels?
A. 3.17
B. 4
C. 3
D. 2
Correct Answer:
B
Chapter: 40
Q525:
In general, if a signal has L levels, each level needs _______ bits.
A. log2 L
B. L
C. log2 L + 1
D. L - log2 L
Correct Answer:
A
Chapter: 40
Q526:
Fill in the blank: A digital signal with 8 levels requires _______ bits per level.
A. 2
B. 1
C. 3
D. 4
Correct Answer:
C
Chapter: 40
Q527:
If a digital signal has 9 levels, the closest integer value for the number of bits per level is _______.
A. 2
B. 3
C. 4
D. 1
Correct Answer:
B
Chapter: 40
Q528:
A digital signal with 9 levels uses _______ bits per level, which is not a realistic value.
A. 3.17
B. 4
C. 3
D. 2
Correct Answer:
A
Chapter: 40
Q529:
The number of bits needed per level for a signal with 4 levels is determined by the formula _______.
A. log2 L
B. L
C. L x log2
D. log2 L + 1
Correct Answer:
A
Chapter: 40
Q530:
If a digital signal has 8 levels, how many bits are needed to represent each level?
A. 2
B. 3
C. 1
D. 4
Correct Answer:
C
Chapter: 40
Q531:
If a digital signal has 8 levels, each level will be represented by _______ bits.
A. 1
B. 2
C. 3
D. 4
Correct Answer:
C
Chapter: 40
Q532:
The formula to calculate the number of bits per level in a digital signal with L levels is _______.
A. log2 L
B. log L
C. L x log2
D. log2 (L-1)
Correct Answer:
A
Chapter: 40
Q533:
If a signal has L levels, the number of bits per level can be calculated using _______.
A. log2 L
B. L
C. L x log2
D. log2 (L-1)
Correct Answer:
A
Chapter: 41
Q534:
The bit rate is expressed in _______.
A. bits per second (bps)
B. bits per minute (bpm)
C. bytes per second (Bps)
D. bytes per minute (Bpm)
Correct Answer:
A
Chapter: 41
Q535:
What is the unit for bit rate?
A. kilobytes per second (kbps)
B. bits per second (bps)
C. megabytes per second (MBps)
D. bytes per second (Bps)
Correct Answer:
B
Chapter: 41
Q536:
In digital communication, bit rate is calculated in _______.
A. seconds
B. bits per second
C. bytes per second
D. frequency
Correct Answer:
B
Chapter: 41
Q537:
The bit rate required for downloading text documents at 100 pages per second can be calculated using _______.
A. a fixed bit rate
B. bit rate per page
C. a frequency rate per page
D. the page content and characters per second
Correct Answer:
D
Chapter: 41
Q538:
What is the bit rate for a digitized 4-kHz analog voice signal with 8 bits per sample?
A. 4 kbps
B. 32 kbps
C. 64 kbps
D. 128 kbps
Correct Answer:
B
Chapter: 41
Q539:
The bit rate for high-definition TV (HDTV) is determined by _______.
A. the pixel count and screen refresh rate
B. the color depth and pixel resolution
C. the compression ratio and screen refresh rate
D. the aspect ratio and pixel count
Correct Answer:
A
Chapter: 41
Q540:
HDTV has a screen resolution of _______ pixels.
A. 1080 by 720
B. 1920 by 1080
C. 800 by 600
D. 1280 by 720
Correct Answer:
B