Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1101: If the available bandwidth is 80 kHz and bit rate is 15 kbps, what is the frequency deviation for Binary FSK?
- A: 10 kHz
- B: 20 kHz
- C: 25 kHz
- D: 15 kHz
View Answer
A
Q1102: Which type of noise is FSK most resistant to compared to ASK?
- A: Phase noise
- B: Amplitude noise
- C: Frequency noise
- D: Impulse noise
View Answer
B
Q1103: Fill in the blank: The _______ of the carrier wave alternates between two levels in Binary FSK.
- A: frequency
- B: amplitude
- C: phase
- D: bit rate
View Answer
A
Q1104: What is the minimum separation between two carrier frequencies in Binary FSK to avoid interference?
- A: Equal to the bit rate
- B: Double the bit rate
- C: Equal to the frequency deviation
- D: None of the above
View Answer
A
Q1105: In Phase Shift Keying (PSK), which parameter is varied to represent data?
- A: Amplitude
- B: Frequency
- C: Phase
- D: Bit rate
View Answer
C
Q1106: Which type of keying is more common than ASK or FSK?
- A: Amplitude Shift Keying (ASK)
- B: Frequency Shift Keying (FSK)
- C: Phase Shift Keying (PSK)
- D: On-Off Keying
View Answer
C
Q1107: Fill in the blank: Binary Phase Shift Keying (BPSK) uses _______ phase shifts to represent data.
- A: two
- B: four
- C: eight
- D: sixteen
View Answer
A
Q1108: What is the advantage of PSK over ASK?
- A: Lower bandwidth usage
- B: Better noise immunity
- C: Higher data rate
- D: Simple implementation
View Answer
B
Q1109: What is the phase difference between the two states in Binary Phase Shift Keying (BPSK)?
- A: 90 degrees
- B: 180 degrees
- C: 270 degrees
- D: 360 degrees
View Answer
B
Q1110: Fill in the blank: PSK is commonly used for _______ communication.
- A: analog
- B: digital
- C: hybrid
- D: audio
View Answer
B