Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q981: In digital-to-analog conversion, which characteristic of the signal remains constant while the amplitude changes?
- A: Frequency
- B: Phase
- C: Amplitude
- D: Both frequency and phase
View Answer
B
Q982: 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
View Answer
A
Q983: 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
View Answer
B
Q984: 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
View Answer
B
Q985: 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
View Answer
A
Q986: In amplitude shift keying (ASK), which characteristic of the carrier signal is varied?
- A: Frequency
- B: Phase
- C: Amplitude
- D: None of the above
View Answer
C
Q987: 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
View Answer
B
Q988: 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
View Answer
D
Q989: 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
View Answer
A
Q990: 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
View Answer
A