Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 77
Q1001:
Which of the following is an example of digital-to-analog conversion?
A. Amplitude shift keying (ASK)
B. Analog filtering
C. Digital encoding
D. Data decryption
Correct Answer:
A
Chapter: 77
Q1002:
In digital-to-analog conversion, the rate at which signal elements are transmitted is referred to as _______.
A. Bit rate
B. Signal rate
C. Baud rate
D. Frequency rate
Correct Answer:
C
Chapter: 77
Q1003:
What is the relationship between baud rate and bit rate in analog transmission?
A. Baud rate ≤ Bit rate
B. Baud rate > Bit rate
C. Baud rate = Frequency
D. Baud rate ≥ Signal rate
Correct Answer:
A
Chapter: 77
Q1004:
If a sine wave's frequency is increased, what happens to the signal?
A. The signal gets compressed
B. The signal becomes faster
C. The signal amplitude increases
D. The signal phase changes
Correct Answer:
B
Chapter: 77
Q1005:
Which characteristic of the carrier signal is varied in frequency shift keying (FSK)?
A. Amplitude
B. Frequency
C. Phase
D. None of the above
Correct Answer:
B
Chapter: 77
Q1006:
In Binary Phase Shift Keying (BPSK), the carrier signal’s _______ is altered to represent data.
A. Amplitude
B. Frequency
C. Phase
D. None of the above
Correct Answer:
C
Chapter: 77
Q1007:
Which method is used to represent digital data by changing the phase of a signal?
A. Amplitude shift keying
B. Frequency shift keying
C. Phase shift keying
D. None of the above
Correct Answer:
C
Chapter: 77
Q1008:
How many characteristics of a sine wave are typically used in digital-to-analog conversion?
A. One
B. Two
C. Three
D. Four
Correct Answer:
C
Chapter: 77
Q1009:
What is the primary purpose of the carrier signal in digital-to-analog conversion?
A. To carry the data
B. To encode the signal
C. To filter noise
D. To amplify the signal
Correct Answer:
A
Chapter: 77
Q1010:
If a carrier signal is modulated using frequency shift keying (FSK), what changes in the signal?
A. Only amplitude
B. Only frequency
C. Only phase
D. Amplitude and phase
Correct Answer:
B
Chapter: 77
Q1011:
What type of modulation uses both frequency and phase simultaneously?
A. Quadrature amplitude modulation
B. Binary phase shift keying
C. Binary amplitude shift keying
D. Digital filtering
Correct Answer:
A
Chapter: 77
Q1012:
If an analog signal carries 4 bits per signal element and 2000 signal elements are transmitted per second, the bit rate is _______.
A. 2000 bps
B. 4000 bps
C. 8000 bps
D. 16000 bps
Correct Answer:
C
Chapter: 78
Q1013:
What are the two basic issues to review before discussing digital-to-analog modulation methods?
A. Bit and Baud rates, and the Carrier Signal
B. Phase and Frequency
C. Amplitude and Modulation
D. Data Rate and Signal Strength
Correct Answer:
A
Chapter: 78
Q1014:
In analog transmission, the baud rate is _______ compared to the bit rate.
A. greater than
B. equal to
C. less than or equal to
D. unrelated to
Correct Answer:
C
Chapter: 78
Q1015:
What is the relationship between bandwidth required and signal rate in most cases?
A. Directly proportional
B. Inversely proportional
C. Equal to
D. Independent of
Correct Answer:
A
Chapter: 78
Q1016:
An analog signal carries 4 bits per signal element. If 1000 signal elements are sent per second, what is the bit rate?
A. 4000 bps
B. 8000 bps
C. 1000 bps
D. 2000 bps
Correct Answer:
B
Chapter: 78
Q1017:
If the bit rate is 8000 bps and the baud rate is 1000, how many bits are carried per signal element?
A. 4
B. 6
C. 8
D. 10
Correct Answer:
C
Chapter: 78
Q1018:
What is the main function of a carrier signal in digital-to-analog conversion?
A. Carry the data
B. Filter noise
C. Amplify the signal
D. Correct errors
Correct Answer:
A
Chapter: 78
Q1019:
In analog transmission, which aspect ensures proper synchronization?
A. Bit Rate
B. Baud Rate
C. Carrier Signal
D. Signal Element
Correct Answer:
C
Chapter: 78
Q1020:
How many data elements are carried by each signal element in a bit rate of 8000 bps and baud rate of 1000?
A. 4
B. 6
C. 8
D. 10
Correct Answer:
C