Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 78
Q1021:
The relationship between data rate and signal rate is essential in _______.
A. Digital-to-Analog Conversion
B. Error Correction
C. Noise Filtering
D. Signal Amplification
Correct Answer:
A
Chapter: 78
Q1022:
What happens to bandwidth when the signal rate increases?
A. It increases
B. It decreases
C. It remains constant
D. It fluctuates unpredictably
Correct Answer:
A
Chapter: 78
Q1023:
What is the purpose of baud rate in analog transmission?
A. Measure bits transmitted per second
B. Measure signal elements transmitted per second
C. Indicate carrier signal strength
D. Determine data element size
Correct Answer:
B
Chapter: 78
Q1024:
What defines a sine wave in digital-to-analog conversion?
A. Amplitude and Frequency
B. Amplitude, Frequency, and Phase
C. Carrier Signal and Bandwidth
D. Data Rate and Signal Rate
Correct Answer:
B
Chapter: 78
Q1025:
By changing one of the characteristics of a sine wave, what can it represent?
A. Analog data
B. Digital data
C. Noise
D. Error correction
Correct Answer:
B
Chapter: 78
Q1026:
What is the formula to calculate the bit rate if the signal carries 4 bits per element and transmits 1000 elements per second?
A. Bit Rate = Signal Rate × Data Elements
B. Bit Rate = Signal Rate ÷ Data Elements
C. Bit Rate = Bandwidth × Signal Elements
D. Bit Rate = Frequency × Baud Rate
Correct Answer:
A
Chapter: 78
Q1027:
Which of the following is NOT a characteristic of a sine wave in digital-to-analog conversion?
A. Amplitude
B. Frequency
C. Phase
D. Signal Rate
Correct Answer:
D
Chapter: 78
Q1028:
What is required to ensure real-time audio and video synchronization?
A. Bit Rate
B. Synchronous Transmission
C. Isochronous Transmission
D. Baud Rate
Correct Answer:
C
Chapter: 78
Q1029:
What are the characteristics of digital-to-analog conversion?
A. Amplitude and Phase
B. Frequency and Signal Strength
C. Bit and Baud Rates, and Carrier Signal
D. Data Rate and Bandwidth
Correct Answer:
C
Chapter: 78
Q1030:
In analog transmission, the bandwidth required is proportional to _______.
A. Signal Rate
B. Phase Shift
C. Bit Rate
D. Amplitude
Correct Answer:
A
Chapter: 78
Q1031:
What is the purpose of the carrier signal in analog transmission?
A. Carry the signal over a distance
B. Reduce noise in the signal
C. Correct errors during transmission
D. Change data elements into signal elements
Correct Answer:
A
Chapter: 78
Q1032:
Which characteristic of a sine wave remains constant in Binary Amplitude Shift Keying?
A. Frequency
B. Amplitude
C. Phase
D. Data Rate
Correct Answer:
A
Chapter: 78
Q1033:
In Binary Amplitude Shift Keying, the amplitude of the carrier signal is _______.
A. Constant
B. Varied
C. Irrelevant
D. Reduced
Correct Answer:
B
Chapter: 79
Q1034:
In Binary Amplitude Shift Keying (Binary ASK), what characteristic of the carrier signal changes?
A. Amplitude
B. Frequency
C. Phase
D. Signal Rate
Correct Answer:
A
Chapter: 79
Q1035:
What remains constant in Binary ASK?
A. Amplitude and Frequency
B. Phase and Frequency
C. Amplitude and Phase
D. Data Rate and Signal Rate
Correct Answer:
B
Chapter: 79
Q1036:
What is varied in Amplitude Shift Keying (ASK) to create signal elements?
A. Amplitude
B. Frequency
C. Phase
D. Data Rate
Correct Answer:
A
Chapter: 79
Q1037:
What does ASK stand for in digital modulation?
A. Amplitude Signal Keying
B. Analog Signal Keying
C. Amplitude Shift Keying
D. Analog Shift Keying
Correct Answer:
C
Chapter: 79
Q1038:
What is another name for Binary ASK?
A. Phase Modulation
B. On-Off Keying
C. Frequency Modulation
D. Signal Shift Keying
Correct Answer:
B
Chapter: 79
Q1039:
In ASK, how many amplitude levels are used in binary data representation?
A. One
B. Two
C. Three
D. Four
Correct Answer:
B
Chapter: 79
Q1040:
What is the primary disadvantage of Binary ASK?
A. Susceptible to noise
B. Complex design
C. High bandwidth requirement
D. Requires multiple carrier signals
Correct Answer:
A