Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1151: In a constellation diagram, each dot represents a _______.
- A: Bit
- B: Symbol
- C: Packet
- D: Frame
View Answer
B
Q1152: The number of points in a constellation diagram is determined by _______.
- A: Noise level
- B: Modulation order
- C: Signal-to-noise ratio
- D: Transmission power
View Answer
B
Q1153: A higher number of dots in a constellation diagram indicates _______.
- A: More noise in the signal
- B: Lower bit rate
- C: Higher data rate
- D: More bandwidth usage
View Answer
C
Q1154: Which modulation technique uses four distinct phase shifts?
- A: BPSK
- B: QPSK
- C: FSK
- D: ASK
View Answer
B
Q1155: The spacing between points in a constellation diagram determines _______.
- A: Signal bandwidth
- B: Noise immunity
- C: Power efficiency
- D: Transmission distance
View Answer
B
Q1156: Which modulation technique has the simplest constellation diagram?
- A: QAM
- B: BPSK
- C: QPSK
- D: 16-QAM
View Answer
B
Q1157: The ability of a receiver to distinguish phase differences in PSK is limited by _______.
- A: Signal power
- B: Noise interference
- C: Equipment accuracy
- D: Antenna gain
View Answer
C
Q1158: A constellation diagram provides insight into _______.
- A: Signal distortion
- B: Frequency shifts
- C: Digital data representation
- D: Transmission latency
View Answer
C
Q1159: The advantage of QAM over PSK is _______.
- A: Lower error rate
- B: Higher data rates
- C: Simpler implementation
- D: Less bandwidth usage
View Answer
B
Q1160: What does Amplitude Modulation (AM) primarily modify in a signal?
- A: Frequency
- B: Phase
- C: Amplitude
- D: Wavelength
View Answer
C