Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1261: Fill in the blank: In FDM, each signal is modulated onto a different _______.
- A: Time slot
- B: Amplitude
- C: Frequency
- D: Bit rate
View Answer
C
Q1262: In FDM, a composite signal is formed by combining multiple _______.
- A: Time slots
- B: Frequency bands
- C: Data packets
- D: Bit sequences
View Answer
B
Q1263: If a telephone network uses analog transmission, which technique is used to combine multiple calls?
- A: Time-Division Multiplexing
- B: Frequency-Division Multiplexing
- C: Code-Division Multiplexing
- D: Wavelength-Division Multiplexing
View Answer
B
Q1264: Which of the following is NOT true about Frequency-Division Multiplexing?
- A: Each signal is modulated onto a unique carrier frequency
- B: FDM is mainly used for digital signals
- C: Guard bands are used to separate signals
- D: A demultiplexer extracts individual signals at the receiving end
View Answer
B
Q1265: What is the disadvantage of FDM?
- A: Requires high-speed clocks
- B: Increases bandwidth efficiency
- C: Requires guard bands, which reduce efficiency
- D: Works only with digital signals
View Answer
C
Q1266: Fill in the blank: In an FDM system, signals are combined into a _______ before transmission.
- A: Digital packet
- B: Single composite signal
- C: Time slot
- D: Separate data stream
View Answer
B
Q1267: What is the main advantage of using fiber-optic cables over metallic transmission cables?
- A: Higher data rate
- B: Lower cost
- C: Greater flexibility
- D: More interference
View Answer
A
Q1268: Why is using a fiber-optic cable for a single line considered wasteful?
- A: It has a limited lifespan
- B: It requires frequent maintenance
- C: It has high bandwidth capacity
- D: It is prone to signal loss
View Answer
C
Q1269: What technique allows multiple signals to be transmitted over a single fiber-optic cable?
- A: Frequency-Division Multiplexing (FDM)
- B: Time-Division Multiplexing (TDM)
- C: Wavelength-Division Multiplexing (WDM)
- D: Code-Division Multiplexing (CDM)
View Answer
C
Q1270: What component is essential in Wavelength-Division Multiplexing (WDM) for combining different wavelengths?
- A: Amplifier
- B: Prisms
- C: Resistor
- D: Capacitor
View Answer
B