Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 90
Q1221:
Multiplexing allows multiple _______ to share a single communication channel.
A. Networks
B. Signals
C. Users
D. Routers
Correct Answer:
B
Chapter: 90
Q1222:
What are the main categories of multiplexing?
A. Space and Time Multiplexing
B. Digital and Analog Multiplexing
C. Frequency and Time Division Multiplexing
D. Signal and Wave Multiplexing
Correct Answer:
C
Chapter: 90
Q1223:
Frequency-Division Multiplexing (FDM) is an example of _______ multiplexing.
A. Analog
B. Digital
C. Optical
D. Hybrid
Correct Answer:
A
Chapter: 90
Q1224:
Which technique is used when the bandwidth of a link is greater than the combined bandwidths of signals?
A. Time-Division Multiplexing (TDM)
B. Frequency-Division Multiplexing (FDM)
C. Code Division Multiple Access (CDMA)
D. Wavelength Division Multiplexing (WDM)
Correct Answer:
B
Chapter: 90
Q1225:
In Frequency-Division Multiplexing (FDM), signals from different devices modulate _______.
A. The same frequency
B. Different carrier frequencies
C. A single data stream
D. Digital pulses
Correct Answer:
B
Chapter: 90
Q1226:
What happens to modulated signals in Frequency-Division Multiplexing (FDM)?
A. They are amplified separately
B. They are converted into digital signals
C. They are combined into a single composite signal
D. They are encrypted for security
Correct Answer:
C
Chapter: 90
Q1227:
Which type of multiplexing is commonly used in radio and TV broadcasting?
A. Time-Division Multiplexing (TDM)
B. Frequency-Division Multiplexing (FDM)
C. Code Division Multiplexing (CDM)
D. Wavelength Division Multiplexing (WDM)
Correct Answer:
B
Chapter: 90
Q1228:
The main requirement for using Frequency-Division Multiplexing (FDM) is that the link’s bandwidth must be _______.
A. Less than the total bandwidth of the signals
B. Equal to the total bandwidth of the signals
C. Greater than the total bandwidth of the signals
D. Unaffected by the number of signals
Correct Answer:
C
Chapter: 90
Q1229:
Which of the following is an example of FDM in real-world applications?
A. Ethernet networking
B. Optical fiber communication
C. AM and FM radio broadcasting
D. Serial data transmission
Correct Answer:
C
Chapter: 90
Q1230:
In Frequency-Division Multiplexing (FDM), each signal is modulated onto _______.
A. The same carrier wave
B. A different carrier frequency
C. A digital time slot
D. A shared data packet
Correct Answer:
B
Chapter: 90
Q1231:
Which multiplexing method is best suited for analog signals?
A. Time-Division Multiplexing (TDM)
B. Frequency-Division Multiplexing (FDM)
C. Statistical Multiplexing
D. Space-Division Multiplexing
Correct Answer:
B
Chapter: 90
Q1232:
Which of the following is a key characteristic of Frequency-Division Multiplexing (FDM)?
A. It assigns unique time slots to each signal
B. It requires signals to be digital
C. It modulates signals onto different frequencies
D. It cannot be used in wireless communication
Correct Answer:
C
Chapter: 90
Q1233:
What happens when multiple signals in FDM overlap in frequency?
A. Data loss occurs
B. Signals interfere with each other
C. The system automatically corrects errors
D. The bandwidth increases
Correct Answer:
B
Chapter: 90
Q1234:
In Frequency-Division Multiplexing (FDM), each signal occupies a separate _______.
A. Time slot
B. Frequency band
C. Network channel
D. Data packet
Correct Answer:
B
Chapter: 91
Q1235:
What type of technique is used when the bandwidth of a link is greater than the combined bandwidths of signals?
A. Digital multiplexing
B. Time-Division Multiplexing
C. Frequency-Division Multiplexing
D. Space-Division Multiplexing
Correct Answer:
C
Chapter: 91
Q1236:
Assume a voice channel occupies a bandwidth of 4 kHz. If we combine three voice channels into a link with 12 kHz bandwidth, what is the total frequency range needed?
A. 16 kHz - 28 kHz
B. 20 kHz - 32 kHz
C. 24 kHz - 36 kHz
D. 28 kHz - 40 kHz
Correct Answer:
B
Chapter: 91
Q1237:
If five channels, each with a 100-kHz bandwidth, are multiplexed with a 10 kHz guard band between channels, what is the minimum bandwidth required?
A. 500 kHz
B. 540 kHz
C. 550 kHz
D. 600 kHz
Correct Answer:
C
Chapter: 91
Q1238:
A multiplexing technique that divides the bandwidth into separate frequency bands is called?
A. Code Division Multiplexing
B. Frequency-Division Multiplexing
C. Time-Division Multiplexing
D. Space-Division Multiplexing
Correct Answer:
B
Chapter: 91
Q1239:
In Frequency-Division Multiplexing (FDM), what prevents interference between adjacent signals?
A. Digital signals
B. Guard bands
C. Noise filtering
D. Modulation
Correct Answer:
B
Chapter: 91
Q1240:
What is the main requirement for FDM to be effective?
A. The total signal bandwidth must be less than the available channel bandwidth
B. The link must be wireless
C. The signals must be digital
D. The bandwidth must be fixed
Correct Answer:
A