Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 53
Q701:
If the delay for the first packet is 20 ms, the second is 45 ms, and the third is 40 ms, what issue arises?
A. Bandwidth issue
B. Jitter
C. Latency
D. Packet loss
Correct Answer:
B
Chapter: 53
Q702:
Fill in the blank: ______ occurs when different packets encounter different delays.
A. Jitter
B. Latency
C. Propagation time
D. Transmission time
Correct Answer:
A
Chapter: 53
Q703:
What does the bandwidth of a network define?
A. Maximum data transfer rate
B. Minimum data transfer rate
C. Average delay
D. Total jitter
Correct Answer:
A
Chapter: 53
Q704:
Fill in the blank: ______ refers to the total time taken for a packet to reach its destination.
A. Bandwidth
B. Delay
C. Jitter
D. Throughput
Correct Answer:
B
Chapter: 53
Q705:
How can the bandwidth-delay product be calculated?
A. Bandwidth × Jitter
B. Bandwidth ÷ Delay
C. Bandwidth × Delay
D. Bandwidth + Delay
Correct Answer:
C
Chapter: 53
Q706:
Which type of data is most affected by jitter?
A. Text messages
B. Time-sensitive data like audio/video
C. Email
D. File transfers
Correct Answer:
B
Chapter: 53
Q707:
What is the delay if the first packet takes 30 ms, the second 50 ms, and the third 40 ms?
A. 40 ms
B. 50 ms
C. Average of all delays
D. Cannot be determined
Correct Answer:
C
Chapter: 54
Q708:
What is the smallest entity that can represent a piece of information?
A. Signal element
B. Data element
C. Bit
D. Frame
Correct Answer:
C
Chapter: 54
Q709:
Fill in the blank: ______ is the shortest unit of a digital signal.
A. Data element
B. Signal element
C. Frame
D. Packet
Correct Answer:
B
Chapter: 54
Q710:
What is always needed in digital-to-digital conversion?
A. Line coding
B. Block coding
C. Scrambling
D. Modulation
Correct Answer:
A
Chapter: 54
Q711:
Fill in the blank: ______ represents the data elements in a transmission system.
A. Signal elements
B. Data elements
C. Frames
D. Packets
Correct Answer:
B
Chapter: 54
Q712:
What type of conversion includes line coding, block coding, and scrambling?
A. Analog-to-digital conversion
B. Digital-to-digital conversion
C. Digital transmission
D. Analog transmission
Correct Answer:
B
Chapter: 54
Q713:
Fill in the blank: Digital-to-digital conversion includes ______, block coding, and scrambling.
A. Line coding
B. Modulation
C. Signal conversion
D. Analog conversion
Correct Answer:
A
Chapter: 54
Q714:
What does a signal element represent in digital transmission?
A. Data elements
B. The carrier of data elements
C. Bit
D. Frequency
Correct Answer:
B
Chapter: 54
Q715:
What is the primary purpose of scrambling in digital-to-digital conversion?
A. Increase bandwidth
B. Eliminate synchronization problems
C. Reduce noise
D. Improve signal strength
Correct Answer:
B
Chapter: 54
Q716:
What is the relationship between signal elements and data elements?
A. Signal elements carry data elements
B. Data elements carry signal elements
C. Signal elements are larger
D. Data elements are larger
Correct Answer:
A
Chapter: 54
Q717:
Fill in the blank: ______ is a necessary step in digital-to-digital conversion to encode data.
A. Scrambling
B. Block coding
C. Line coding
D. Modulation
Correct Answer:
C
Chapter: 54
Q718:
What is the primary difference between data elements and signal elements?
A. Data elements are carriers
B. Signal elements are carriers
C. Both represent information
D. They are the same
Correct Answer:
B
Chapter: 54
Q719:
Fill in the blank: ______ conversion converts an analog signal into a digital signal.
A. Digital-to-digital
B. Analog-to-digital
C. Digital transmission
D. Line coding
Correct Answer:
B
Chapter: 54
Q720:
What method is used for encoding data in digital-to-digital conversion?
A. Signal multiplexing
B. Line coding
C. Modulation
D. Analog processing
Correct Answer:
B