Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1371: One key advantage of spread spectrum in wireless applications is ______.
- A: lower cost
- B: limited range
- C: protection from malicious jamming
- D: better voice quality
View Answer
C
Q1372: In spread spectrum communication, the original signal is ______.
- A: compressed
- B: broadcasted directly
- C: spread across a wider bandwidth
- D: sent as analog
View Answer
C
Q1373: The technique used to protect wireless transmission from eavesdropping is called ______.
- A: Error detection
- B: Signal multiplexing
- C: Spread Spectrum
- D: Frequency division multiplexing
View Answer
C
Q1374: Which of the following is NOT an objective of spread spectrum?
- A: Protect from jamming
- B: Increase signal bandwidth
- C: Reduce redundancy
- D: Prevent eavesdropping
View Answer
C
Q1375: What does spread spectrum add to the original signal for security?
- A: Delay
- B: Redundancy
- C: Noise
- D: Compression
View Answer
B
Q1376: The redundancy in spread spectrum is used for ______.
- A: Slowing down the signal
- B: Enhancing speed
- C: Spreading the signal across a wide band
- D: Filtering the signal
View Answer
C
Q1377: In wireless communication, which factor helps avoid malicious jamming?
- A: High signal frequency
- B: Redundancy and spreading
- C: Multiple antennas
- D: Direct signal transmission
View Answer
B
Q1378: Which technique uses multiple carrier frequencies to transmit a signal in different time slots?
- A: DSSS
- B: FHSS
- C: OFDM
- D: CDMA
View Answer
B
Q1379: What is the full form of FHSS?
- A: Frequency High Spread Signal
- B: Frequency Hop Spread Signal
- C: Frequency Hopping Spread Spectrum
- D: Frequency Hold Spread Signal
View Answer
C
Q1380: In FHSS, the source signal modulates ______ at each moment.
- A: same carrier frequency
- B: different modulated signals
- C: a new carrier frequency
- D: direct signal each time
View Answer
C