Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 88
Q1201:
What is the primary purpose of Frequency Modulation (FM)?
A. Increase bandwidth
B. Reduce noise and interference
C. Improve digital transmission
D. Compress data
Correct Answer:
B
Chapter: 88
Q1202:
What is the primary advantage of Phase Modulation (PM) over Amplitude Modulation (AM)?
A. More bandwidth-efficient
B. Less susceptible to noise
C. Easier to demodulate
D. Used for digital signals
Correct Answer:
B
Chapter: 88
Q1203:
Which modulation technique is commonly used in radio broadcasting?
A. Amplitude Modulation (AM)
B. Phase Modulation (PM)
C. Pulse Code Modulation (PCM)
D. Frequency Modulation (FM)
Correct Answer:
D
Chapter: 88
Q1204:
A system that converts analog signals into digital signals is called _______.
A. Modulator
B. Demodulator
C. Encoder
D. Converter
Correct Answer:
C
Chapter: 89
Q1205:
What is the process of simultaneous transmission of multiple signals across a single data link called?
A. Multiplexing
B. Modulation
C. Demodulation
D. Encoding
Correct Answer:
A
Chapter: 89
Q1206:
As data and telecommunication use increases, what also increases?
A. Storage capacity
B. Network traffic
C. Power consumption
D. Processing speed
Correct Answer:
B
Chapter: 89
Q1207:
What is one approach to handling increased network traffic?
A. Adding individual links for new channels
B. Reducing the number of users
C. Using lower bandwidth connections
D. Disabling multiple connections
Correct Answer:
A
Chapter: 89
Q1208:
What is another method to handle high traffic without adding individual links?
A. Install higher bandwidth links
B. Reduce the number of signals
C. Increase transmission delay
D. Use separate networks for each signal
Correct Answer:
A
Chapter: 89
Q1209:
What is a major advantage of installing higher bandwidth links?
A. Can carry multiple signals
B. Reduces signal interference
C. Eliminates the need for routing
D. Converts analog signals to digital
Correct Answer:
A
Chapter: 89
Q1210:
Multiplexing is primarily used to _______.
A. Enhance security
B. Increase signal speed
C. Optimize bandwidth usage
D. Store data efficiently
Correct Answer:
C
Chapter: 89
Q1211:
Which technique allows multiple signals to share a single communication channel?
A. Encoding
B. Decoding
C. Multiplexing
D. Modulation
Correct Answer:
C
Chapter: 89
Q1212:
Time Division Multiplexing (TDM) is an example of _______.
A. Analog multiplexing
B. Digital multiplexing
C. Frequency-based multiplexing
D. Signal attenuation
Correct Answer:
B
Chapter: 89
Q1213:
Which multiplexing technique is commonly used in fiber-optic communication?
A. Time Division Multiplexing (TDM)
B. Frequency Division Multiplexing (FDM)
C. Wavelength Division Multiplexing (WDM)
D. Pulse Code Modulation (PCM)
Correct Answer:
C
Chapter: 89
Q1214:
Frequency Division Multiplexing (FDM) works by _______.
A. Assigning each signal a unique time slot
B. Using different frequencies for different signals
C. Converting signals into digital format
D. Sending one signal at a time
Correct Answer:
B
Chapter: 89
Q1215:
Which of the following is NOT an advantage of multiplexing?
A. Efficient bandwidth utilization
B. Cost reduction
C. Reduced network traffic
D. Simultaneous data transmission
Correct Answer:
C
Chapter: 89
Q1216:
In Time Division Multiplexing (TDM), time slots are _______.
A. Fixed for each signal
B. Randomly assigned
C. Shared dynamically
D. Used only when required
Correct Answer:
A
Chapter: 89
Q1217:
Which technique is used when multiple signals share a communication medium based on frequency separation?
A. Time Division Multiplexing (TDM)
B. Frequency Division Multiplexing (FDM)
C. Space Division Multiplexing (SDM)
D. Code Division Multiplexing (CDM)
Correct Answer:
B
Chapter: 89
Q1218:
Which of the following is a disadvantage of using multiple individual links for each new channel?
A. Increased cost
B. Reduced bandwidth usage
C. Enhanced security
D. Lower signal interference
Correct Answer:
A
Chapter: 89
Q1219:
Which type of multiplexing is commonly used in cellular networks?
A. Space Division Multiplexing (SDM)
B. Code Division Multiple Access (CDMA)
C. Amplitude Modulation (AM)
D. Pulse Width Modulation (PWM)
Correct Answer:
B
Chapter: 90
Q1220:
What is the process of simultaneous transmission of multiple signals across a single data link called?
A. Modulation
B. Multiplexing
C. Demodulation
D. Encoding
Correct Answer:
B