Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 58
Q761:
Line coding schemes can be divided into how many broad categories?
A. Two
B. Four
C. Five
D. Six
Correct Answer:
C
Chapter: 58
Q762:
Which of the following is not a category of line coding schemes?
A. Unipolar
B. Polar
C. Analog
D. Bipolar
Correct Answer:
C
Chapter: 58
Q763:
What type of line coding uses three voltage levels: positive, negative, and zero?
A. Unipolar
B. Polar
C. Bipolar
D. Multilevel
Correct Answer:
C
Chapter: 58
Q764:
Fill in the blank: Bipolar line coding uses ______ voltage levels to represent data.
A. Single
B. Two
C. Three
D. Multiple
Correct Answer:
C
Chapter: 59
Q765:
Multilevel line coding is primarily used for ______.
A. Long-distance communication
B. High-speed data transmission
C. Low-speed data transfer
D. Audio signals
Correct Answer:
B
Chapter: 59
Q766:
Which of the following line coding schemes provides the highest bandwidth efficiency?
A. Unipolar
B. Polar
C. Multilevel
D. Bipolar
Correct Answer:
C
Chapter: 59
Q767:
Fill in the blank: ______ line coding allows each data element to be represented by more than one signal element.
A. Bipolar
B. Multilevel
C. Polar
D. Unipolar
Correct Answer:
B
Chapter: 60
Q768:
What is a key advantage of multilevel line coding schemes?
A. Simplicity
B. Low error rates
C. Bandwidth efficiency
D. High synchronization
Correct Answer:
C
Chapter: 60
Q769:
Fill in the blank: Multitransition line coding schemes involve ______ transitions for each bit transmitted.
A. No
B. One
C. Two
D. Multiple
Correct Answer:
D
Chapter: 60
Q770:
Multitransition line coding is used for ______ applications.
A. High-speed
B. Low-power
C. Secure
D. Analog
Correct Answer:
A
Chapter: 60
Q771:
What is a key limitation of multitransition line coding?
A. High power consumption
B. High synchronization
C. Increased bandwidth usage
D. Low efficiency
Correct Answer:
C
Chapter: 60
Q772:
Fill in the blank: ______ line coding schemes are best for minimizing DC components in the signal.
A. Unipolar
B. Polar
C. Bipolar
D. Multitransition
Correct Answer:
C
Chapter: 61
Q773:
What does block coding do in digital communication?
A. Converts analog signals
B. Changes a block of 'm' bits into 'n' bits
C. Compresses data
D. Eliminates redundancy
Correct Answer:
B
Chapter: 61
Q774:
In block coding, the condition n>mn > mn>m ensures ______.
A. Compression
B. Synchronization
C. Security
D. Bandwidth reduction
Correct Answer:
B
Chapter: 61
Q775:
What is the purpose of redundancy in block coding?
A. Reducing noise
B. Ensuring synchronization
C. Saving bandwidth
D. Increasing speed
Correct Answer:
B
Chapter: 61
Q776:
Fill in the blank: Block coding changes a block of ______ bits into a block of 'n' bits.
A. 1
B. m
C. 2
D. n
Correct Answer:
B
Chapter: 61
Q777:
Which of the following is a commonly used block coding technique?
A. Pulse coding
B. mB/nB encoding
C. Digital signal coding
D. Differential encoding
Correct Answer:
B
Chapter: 61
Q778:
Fill in the blank: The mB/nB encoding technique involves converting 'm' bits into ______ bits.
A. Fewer
B. Equal
C. More
D. Redundant
Correct Answer:
C
Chapter: 61
Q779:
Which characteristic of block coding helps ensure synchronization?
A. Bandwidth efficiency
B. Redundancy
C. Error detection
D. Compression
Correct Answer:
B
Chapter: 61
Q780:
What is one advantage of block coding in digital communication?
A. Reduces error
B. Improves synchronization
C. Saves bandwidth
D. Speeds up transmission
Correct Answer:
B