Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 75
Q961:
What is the baud rate in an analog signal if the bit rate is 8000 bps and 1000 data elements are carried by each signal element?
A. 1000 baud
B. 8000 baud
C. 2000 baud
D. None of the above
Correct Answer:
A
Chapter: 75
Q962:
What does baud rate represent in digital-to-analog modulation?
A. The number of data bits transmitted per second
B. The number of signal elements transmitted per second
C. The frequency of the carrier signal
D. The speed of data encoding
Correct Answer:
B
Chapter: 75
Q963:
The baud rate in analog-to-digital conversion is _______ than or equal to the bit rate.
A. Less
B. Equal to
C. Greater
D. None of the above
Correct Answer:
B
Chapter: 75
Q964:
Which of the following factors determines the bandwidth required for digital-to-analog conversion?
A. Signal rate
B. Carrier signal
C. Amplitude of signal
D. All of the above
Correct Answer:
A
Chapter: 75
Q965:
In amplitude shift keying (ASK), which characteristic of the carrier signal is varied?
A. Frequency
B. Phase
C. Amplitude
D. None of the above
Correct Answer:
C
Chapter: 75
Q966:
Binary Amplitude Shift Keying (BASK) involves _______ of the carrier signal.
A. Varying its frequency
B. Varying its amplitude
C. Varying its phase
D. None of the above
Correct Answer:
B
Chapter: 75
Q967:
Which of the following methods is used to change the characteristics of an analog signal to represent digital data?
A. Amplitude shift keying
B. Frequency shift keying
C. Phase shift keying
D. All of the above
Correct Answer:
D
Chapter: 75
Q968:
Which of the following describes the process of digital-to-analog conversion?
A. Amplitude, frequency, and phase of the analog signal are varied to represent digital data.
B. The signal is directly transmitted without modification.
C. Only frequency is adjusted to represent digital data.
D. None of the above
Correct Answer:
A
Chapter: 75
Q969:
If the bit rate is 8000 bps and the baud rate is 1000 baud, how many data elements are carried by each signal element?
A. 8
B. 4
C. 2
D. 1
Correct Answer:
A
Chapter: 75
Q970:
What happens to the amplitude in Binary Amplitude Shift Keying (BASK)?
A. It remains constant
B. It is varied based on digital data
C. It changes the phase of the signal
D. None of the above
Correct Answer:
B
Chapter: 76
Q971:
In serial transmission, data is transmitted _______.
A. one bit at a time
B. through multiple channels
C. as a group of bits
D. none of the above
Correct Answer:
A
Chapter: 76
Q972:
Which of the following is an advantage of serial transmission?
A. Requires fewer wires
B. Transfers data faster
C. Has a higher error rate
D. None of the above
Correct Answer:
A
Chapter: 76
Q973:
In serial transmission, data travels _______.
A. through multiple wires
B. one bit at a time
C. over a single wire as a group
D. of multiple wires
Correct Answer:
B
Chapter: 76
Q974:
Which of the following is typically used in long-distance data communication?
A. Parallel transmission
B. Serial transmission
C. Wireless transmission
D. None of the above
Correct Answer:
B
Chapter: 76
Q975:
In synchronous transmission, data is transmitted _______.
A. At random intervals
B. At fixed intervals
C. With no synchronization
D. None of the above
Correct Answer:
B
Chapter: 76
Q976:
What is the main characteristic of isochronous transmission?
A. Guarantees fixed rate data
B. Transmits at random intervals
C. Uses multiple communication channels
D. None of the above
Correct Answer:
A
Chapter: 76
Q977:
In digital-to-analog conversion, the _______ of the analog signal is varied to represent digital data.
A. Amplitude
B. Frequency
C. Phase
D. All of the above
Correct Answer:
A
Chapter: 76
Q978:
Which of the following is not a characteristic of a sine wave?
A. Amplitude
B. Frequency
C. Phase
D. Bit rate
Correct Answer:
D
Chapter: 76
Q979:
The process of changing one of the characteristics of an analog signal based on digital data is called _______.
A. Digital-to-analog conversion
B. Analog-to-digital conversion
C. Signal modulation
D. None of the above
Correct Answer:
A
Chapter: 76
Q980:
If an analog signal carries 4 bits per signal element and 1000 signal elements are sent per second, what is the bit rate?
A. 4000 bps
B. 1000 bps
C. 8000 bps
D. 40000 bps
Correct Answer:
A