Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q781: Fill in the blank: The mB/nBmB/nBmB/nB encoding technique is an example of ______ coding.
- A: Block
- B: Line
- C: Pulse
- D: Analog
View Answer
A
Q782: Which of the following is not a feature of block coding?
- A: Ensures synchronization
- B: Provides redundancy
- C: Reduces complexity
- D: Converts m bits to n bits
View Answer
C
Q783: Fill in the blank: Block coding introduces redundancy to help with ______ in digital communication.
- A: Error correction
- B: Line coding
- C: Synchronization
- D: Data compression
View Answer
C
Q784: Block coding is most useful in ______.
- A: Analog signals
- B: Digital signals
- C: Wireless communication
- D: Optical communication
View Answer
B
Q785: What is the purpose of 4B/5B encoding in block coding?
- A: Compression of data
- B: Error detection
- C: Ensuring synchronization
- D: Increasing bandwidth
View Answer
C
Q786: Fill in the blank: In block coding, 4B/5B encoding converts 4 bits into ______ bits.
- A: 2
- B: 5
- C: 6
- D: 8
View Answer
B
Q787: Which of the following is an advantage of 4B/5B block coding with NRZ-I?
- A: Error detection
- B: Synchronization
- C: Data compression
- D: Power saving
View Answer
B
Q788: Fill in the blank: NRZ-I stands for ______.
- A: Non-Return-to-Zero Inverted
- B: Non-Recoverable Zone Input
- C: Non-Repeating Zero Invert
- D: New-Zone Reduced Input
View Answer
A
Q789: What does NRZ-I encoding use to indicate a binary '1'?
- A: Change in voltage level
- B: No change in voltage level
- C: Signal inversion
- D: Increased frequency
View Answer
C
Q790: Fill in the blank: In 4B/5B encoding, the additional bit ensures that there are no more than ______ consecutive zeros.
- A: 2
- B: 4
- C: 6
- D: 8
View Answer
C