Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q791: What problem does 4B/5B encoding solve in digital communication?
- A: High power consumption
- B: Signal distortion
- C: Lack of synchronization
- D: Bandwidth limitation
View Answer
C
Q792: Which line coding scheme is typically used with 4B/5B encoding?
- A: Manchester encoding
- B: NRZ-I
- C: Differential encoding
- D: Pulse-code modulation
View Answer
B
Q793: Fill in the blank: The ______ coding scheme is commonly paired with 4B/5B encoding to ensure signal integrity.
- A: NRZ-I
- B: Manchester
- C: Polar NRZ
- D: RZ
View Answer
A
Q794: What is one main goal of using 4B/5B encoding in digital signals?
- A: Data compression
- B: Increased redundancy
- C: Improved synchronization
- D: Reduced error rates
View Answer
C
Q795: In NRZ-I encoding, a binary '0' is represented by ______.
- A: A change in signal
- B: No change in signal
- C: A constant high signal
- D: A constant low signal
View Answer
B
Q796: Fill in the blank: The use of redundancy in 4B/5B encoding helps reduce ______ errors.
- A: Transmission
- B: Synchronization
- C: Decoding
- D: Compression
View Answer
B
Q797: Which of the following encoding techniques ensures sufficient transitions for clock recovery?
- A: NRZ
- B: 4B/5B with NRZ-I
- C: RZ
- D: Pulse coding
View Answer
B
Q798: Block coding changes a block of ‘m’ bits into a block of _______ bits.
- A: ‘n’ bits
- B: ‘p’ bits
- C: ‘k’ bits
- D: ‘x’ bits
View Answer
A
Q799: In Block coding, the value of ‘n’ must always be _______ greater than ‘m’.
- A: less
- B: greater
- C: equals
- D: none
View Answer
B
Q800: Which of the following is a technique used for encoding in Block coding?
- A: mB/nB encoding
- B: Binary encoding
- C: Gray code encoding
- D: Arithmetic encoding
View Answer
A