Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 71
Q901:
Which of the following are the steps involved in PCM?
A. Quantization, Sampling, Encoding
B. Quantization, Modulation, Sampling
C. Sampling, Encoding, Modulation
D. Encoding, Sampling, Decompression
Correct Answer:
A
Chapter: 71
Q902:
Which of the following describes Pulse Code Modulation (PCM)?
A. A digital representation of an analog signal using binary code
B. Continuous transmission of analog signals
C. Conversion of digital signals into analog form
D. None of the above
Correct Answer:
A
Chapter: 72
Q903:
Delta Modulation (DM) is a simpler technique than _______.
A. Pulse Code Modulation
B. Amplitude Modulation
C. Frequency Modulation
D. Phase Modulation
Correct Answer:
A
Chapter: 72
Q904:
In Delta Modulation, the system finds the _______ from the previous sample.
A. change in signal
B. amplitude of the signal
C. highest frequency
D. average value
Correct Answer:
A
Chapter: 72
Q905:
Delta Modulation does not use _______ to represent data.
A. code words
B. samples
C. quantization levels
D. encoding
Correct Answer:
A
Chapter: 72
Q906:
Which of the following is a component of Delta Modulation?
A. Sampling Component
B. Quantization Component
C. Encoding Component
D. All of the above
Correct Answer:
D
Chapter: 72
Q907:
In Delta Modulation, the system only considers the _______ of the previous sample for encoding.
A. difference
B. change in value frequency modulation
C. amplitude
Correct Answer:
A
Chapter: 72
Q908:
The main advantage of Delta Modulation (DM) over Pulse Code Modulation (PCM) is its _______.
A. Simplicity
B. increased accuracy
C. encoding speed
D. greater bandwidth usage
Correct Answer:
A
Chapter: 72
Q909:
Delta Demodulation is responsible for _______.
A. Converting digital data back into analog signals
B. Encoding the signal
C. Compressing the signal
D. Filtering the signal
Correct Answer:
A
Chapter: 72
Q910:
Which of the following is true about Delta Modulation?
A. It finds the difference between consecutive samples to represent data.
B. It uses code words to represent each sample.
C. It uses a high level of sampling frequency to improve quality.
D. None of the above
Correct Answer:
A
Chapter: 72
Q911:
Which component of Delta Modulation is used to convert digital signals back to analog signals?
A. Delta Modulation Component
B. Delta Demodulation Component
C. Quantization Component
D. Sampling Component
Correct Answer:
B
Chapter: 72
Q912:
Delta Modulation (DM) does not use code words like Pulse Code Modulation (PCM), instead it focuses on _______.
A. Changes in amplitude
B. High-frequency signals
C. Delta signals
D. None of the above
Correct Answer:
C
Chapter: 72
Q913:
Delta Demodulation is part of the _______ process.
A. Signal conversion
B. Signal quantization
C. Signal encoding
D. Signal transmission
Correct Answer:
A
Chapter: 72
Q914:
Which of the following is a characteristic of Delta Modulation?
A. It is based on the differences between consecutive samples.
B. It uses a large number of code words for encoding.
C. It provides high accuracy by encoding each sample individually.
D. None of the above
Correct Answer:
A
Chapter: 72
Q915:
Delta Modulation (DM) is particularly useful when dealing with _______ signals.
A. Slowly varying
B. High-frequency
C. Periodic
D. Noise-contaminated
Correct Answer:
A
Chapter: 72
Q916:
Which of the following is NOT true about Delta Modulation?
A. It finds the change from the previous sample.
B. It uses a large number of code words.
C. It does not require complex encoding.
D. None of the above
Correct Answer:
B
Chapter: 73
Q917:
In data transmission, when bits are grouped into larger groups, it is called _______.
A. Serial Transmission
B. Parallel Transmission
C. Binary Encoding
D. Group Transmission
Correct Answer:
B
Chapter: 73
Q918:
What is required for Parallel Transmission?
A. Multiple wires
B. Single wire
C. Modulator
D. Encoder
Correct Answer:
A
Chapter: 73
Q919:
Parallel Transmission requires _______ to send multiple bits at once.
A. n wires
B. one wire
C. encoding methods
D. special data streams
Correct Answer:
A
Chapter: 73
Q920:
Which of the following is an advantage of Parallel Transmission?
A. Faster data transfer rate
B. Lower cost
C. Single wire transmission
D. None of the above
Correct Answer:
A