Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q951: 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
View Answer
A
Q952: 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
View Answer
B
Q953: 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
View Answer
B
Q954: In synchronous transmission, data is transmitted _______.
- A: At random intervals
- B: At fixed intervals
- C: With no synchronization
- D: None of the above
View Answer
B
Q955: 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
View Answer
A
Q956: 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
View Answer
A
Q957: Which of the following is not a characteristic of a sine wave?
- A: Amplitude
- B: Frequency
- C: Phase
- D: Bit rate
View Answer
D
Q958: 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
View Answer
A
Q959: 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
View Answer
A
Q960: 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