Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 98
Q1361:
Fill in the blank: Statistical TDM is also referred to as _______ TDM.
A. Frequency-Division
B. Demand-Based
C. Static
D. Synchronous
Correct Answer:
B
Chapter: 98
Q1362:
What type of communication system benefits most from Statistical TDM?
A. Systems with variable data transmission
B. Systems with continuous fixed data rates
C. Systems requiring constant synchronization
D. Systems using only analog signals
Correct Answer:
A
Chapter: 98
Q1363:
Fill in the blank: Statistical TDM is most effective when the number of active users is _______ than the total users in the network.
A. Greater
B. Equal to
C. Less
D. More than double
Correct Answer:
C
Chapter: 98
Q1364:
Which network service provider is more likely to use Statistical TDM?
A. A company with fixed bandwidth allocation
B. A provider with high-demand variable data users
C. A satellite TV provider
D. A traditional telephone network
Correct Answer:
B
Chapter: 98
Q1365:
What is a key challenge of Statistical TDM?
A. Wasting bandwidth
B. Delay due to dynamic slot assignment
C. Inflexibility
D. Requires more cables
Correct Answer:
B
Chapter: 99
Q1366:
What is a primary security goal in wireless communication?
A. High speed data transfer
B. Power saving
C. Preventing eavesdropping and jamming
D. Multi-user access
Correct Answer:
C
Chapter: 99
Q1367:
Why is redundancy added in spread spectrum systems?
A. To increase power usage
B. To improve signal quality
C. To reduce bandwidth
D. To encrypt data
Correct Answer:
B
Chapter: 99
Q1368:
The spreading process in spread spectrum should be ______.
A. related to original signal
B. opposite to the original signal
C. independent of the original signal
D. randomly chosen
Correct Answer:
C
Chapter: 99
Q1369:
Spread spectrum requires bandwidth that is ______.
A. smaller than the original signal
B. same as the original signal
C. larger than the original signal
D. exactly half the original signal
Correct Answer:
C
Chapter: 99
Q1370:
Which of the following is TRUE about spread spectrum?
A. It removes the need for encryption
B. It increases vulnerability to interference
C. It spreads the original signal over a wider bandwidth
D. It reduces signal strength
Correct Answer:
C
Chapter: 99
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
Correct Answer:
C
Chapter: 99
Q1372:
In spread spectrum communication, the original signal is ______.
A. compressed
B. broadcasted directly
C. spread across a wider bandwidth
D. sent as analog
Correct Answer:
C
Chapter: 99
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
Correct Answer:
C
Chapter: 99
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
Correct Answer:
C
Chapter: 99
Q1375:
What does spread spectrum add to the original signal for security?
A. Delay
B. Redundancy
C. Noise
D. Compression
Correct Answer:
B
Chapter: 99
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
Correct Answer:
C
Chapter: 99
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
Correct Answer:
B
Chapter: 100
Q1378:
Which technique uses multiple carrier frequencies to transmit a signal in different time slots?
A. DSSS
B. FHSS
C. OFDM
D. CDMA
Correct Answer:
B
Chapter: 100
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
Correct Answer:
C
Chapter: 100
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
Correct Answer:
C