Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 93
Q1281:
Which of the following is a disadvantage of Wavelength-Division Multiplexing?
A. High power consumption
B. Requires precise optical components
C. Limited data capacity
D. Inefficient for fiber-optic communication
Correct Answer:
B
Chapter: 93
Q1282:
What happens to the combined optical signals in Wavelength-Division Multiplexing at the receiving end?
A. They are transmitted as a single wavelength
B. They are demultiplexed into separate wavelengths
C. They are converted into electrical signals first
D. They are discarded and retransmitted
Correct Answer:
B
Chapter: 93
Q1283:
What allows multiple signals to coexist in Wavelength-Division Multiplexing without interference?
A. Unique time slots
B. Separate wavelengths
C. Different frequency bands
D. Code-based separation
Correct Answer:
B
Chapter: 94
Q1284:
What is the digital process that allows multiple connections to share the high bandwidth of a link?
A. Multiplexing
B. Modulation
C. Demodulation
D. Encoding
Correct Answer:
A
Chapter: 94
Q1285:
Which technology enables multiple signals to be transmitted over a single communication link?
A. Encryption
B. Multiplexing
C. Compression
D. Routing
Correct Answer:
B
Chapter: 94
Q1286:
Fill in the blank: _______ is the process of combining multiple signals into one signal over a shared medium.
A. Modulation
B. Encoding
C. Multiplexing
D. Switching
Correct Answer:
C
Chapter: 94
Q1287:
Which type of multiplexing is commonly used for digital signals?
A. Frequency-Division Multiplexing
B. Time-Division Multiplexing
C. Wavelength-Division Multiplexing
D. Space-Division Multiplexing
Correct Answer:
B
Chapter: 94
Q1288:
What is the main benefit of using multiplexing?
A. Reduces the number of communication channels
B. Increases the cost of transmission
C. Decreases the bandwidth of a link
D. Enables multiple connections to share bandwidth
Correct Answer:
D
Chapter: 94
Q1289:
Fill in the blank: In _______ multiplexing, different signals are transmitted at different times over the same channel.
A. Frequency-Division
B. Time-Division
C. Wavelength-Division
D. Space-Division
Correct Answer:
B
Chapter: 94
Q1290:
Which of the following is NOT a type of multiplexing?
A. Time-Division Multiplexing
B. Frequency-Division Multiplexing
C. Space-Division Multiplexing
D. Packet Switching
Correct Answer:
D
Chapter: 94
Q1291:
What is the key characteristic of Frequency-Division Multiplexing (FDM)?
A. Uses different time slots for signals
B. Assigns different frequencies to signals
C. Requires fiber-optic cables
D. Uses digital signals only
Correct Answer:
B
Chapter: 94
Q1292:
In Time-Division Multiplexing (TDM), signals are separated based on _______.
A. Frequency
B. Time slots
C. Wavelengths
D. Amplitude
Correct Answer:
B
Chapter: 94
Q1293:
What type of multiplexing is commonly used in fiber-optic communication?
A. Wavelength-Division Multiplexing
B. Frequency-Division Multiplexing
C. Time-Division Multiplexing
D. Code-Division Multiplexing
Correct Answer:
A
Chapter: 94
Q1294:
What happens if there is no multiplexing in data transmission?
A. Multiple signals can be transmitted efficiently
B. The bandwidth will be fully utilized
C. Only one signal can be transmitted at a time
D. The transmission speed will increase
Correct Answer:
C
Chapter: 94
Q1295:
Which of the following multiplexing techniques is used in mobile communication?
A. Wavelength-Division Multiplexing
B. Time-Division Multiplexing
C. Code-Division Multiplexing
D. Space-Division Multiplexing
Correct Answer:
C
Chapter: 94
Q1296:
Fill in the blank: _______ allows different users to share the same communication channel by assigning different time slots to each user.
A. Frequency-Division Multiplexing
B. Time-Division Multiplexing
C. Code-Division Multiplexing
D. Space-Division Multiplexing
Correct Answer:
B
Chapter: 94
Q1297:
What is required at the receiving end of a multiplexed signal to separate the original signals?
A. Demodulator
B. Decoder
C. Demultiplexer
D. Amplifier
Correct Answer:
C
Chapter: 94
Q1298:
What is the main disadvantage of multiplexing?
A. Reduces bandwidth usage
B. Increases signal delay
C. Decreases data transmission efficiency
D. Requires multiple communication links
Correct Answer:
B
Chapter: 94
Q1299:
What is the role of a demultiplexer in a multiplexing system?
A. Combines multiple signals into one
B. Splits a single signal into multiple signals
C. Increases bandwidth usage
D. Encrypts the transmitted data
Correct Answer:
B
Chapter: 95
Q1300:
What is the process that allows multiple connections to share the high bandwidth of a link?
A. Multiplexing
B. Switching
C. Encoding
D. Modulation
Correct Answer:
A