Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1321: Which of the following multiplexing techniques is most commonly used for optical fiber communication?
- A: Frequency-Division Multiplexing (FDM)
- B: Time-Division Multiplexing (TDM)
- C: Wavelength-Division Multiplexing (WDM)
- D: Space-Division Multiplexing (SDM)
View Answer
C
Q1322: What is the role of a demultiplexer in a multiplexed communication system?
- A: Combines multiple signals
- B: Splits the combined signal back into individual signals
- C: Increases transmission speed
- D: Generates new signals
View Answer
B
Q1323: Fill in the blank: _______ is a method of combining multiple signals into one signal over a shared medium.
- A: Multiplexing
- B: Modulation
- C: Encoding
- D: Switching
View Answer
A
Q1324: Which component in a multiplexing system assigns time slots to different signals?
- A: Multiplexer
- B: Demultiplexer
- C: Encoder
- D: Modulator
View Answer
A
Q1325: What happens if two signals are assigned overlapping time slots in TDM?
- A: Interference occurs
- B: Data transmission speed increases
- C: Multiplexing efficiency improves
- D: Signals are automatically corrected
View Answer
A
Q1326: Which of the following is a key application of Time-Division Multiplexing?
- A: Digital telephony
- B: AM radio broadcasting
- C: Power transmission
- D: Magnetic storage
View Answer
A
Q1327: Fill in the blank: TDM is an example of _______ multiplexing.
- A: Space-Division
- B: Frequency-Division
- C: Time-Based
- D: Code-Division
View Answer
C
Q1328: What is a major disadvantage of TDM?
- A: High hardware cost
- B: Inefficient bandwidth utilization
- C: Requires separate frequencies for each user
- D: Low data transmission speed
View Answer
A
Q1329: Fill in the blank: _______ is used in digital transmission to allocate time slots for multiple users.
- A: Frequency-Division Multiplexing
- B: Time-Division Multiplexing
- C: Space-Division Multiplexing
- D: Packet Switching
View Answer
B
Q1330: What is the function of a multiplexer?
- A: Splits a signal into multiple outputs
- B: Combines multiple input signals into one
- C: Reduces noise in the signal
- D: Increases data transmission speed
View Answer
B