Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 136
Q1921:
What does a single-bit error mean?
A. A single bit in a data unit changes from 1 to 0 or 0 to 1
B. Two or more bits in the data unit change
C. No bits in the data unit change
D. All bits in the data unit change
Correct Answer:
A
Chapter: 136
Q1922:
Which error is characterized by the alteration of multiple bits in a data unit?
A. Single-bit error
B. Burst error
C. Parity error
D. Checksum error
Correct Answer:
B
Chapter: 136
Q1923:
Fill in the blank: In a burst error, the bits that change in a data unit are typically grouped together in _______.
A. single location
B. non-consecutive locations
C. large packets
D. None of the above
Correct Answer:
A
Chapter: 136
Q1924:
What is the main difference between a single-bit error and a burst error?
A. Single-bit error changes only one bit, while a burst error changes two or more bits
B. Single-bit error changes multiple bits, while a burst error changes only one bit
C. There is no difference
D. Single-bit error is related to larger data units
Correct Answer:
A
Chapter: 136
Q1925:
What type of error occurs when one bit of a data unit changes from 1 to 0 or 0 to 1?
A. Single-bit error
B. Burst error
C. Checksum error
D. Network error
Correct Answer:
A
Chapter: 136
Q1926:
Fill in the blank: A burst error is caused by _______ bits changing in a data unit.
A. one
B. two
C. multiple
D. none
Correct Answer:
C
Chapter: 136
Q1927:
Which of the following best defines a single-bit error?
A. An error where only one bit of a data unit is changed
B. An error where multiple bits in a data unit change
C. An error that occurs due to a protocol failure
D. An error that involves noise in the channel
Correct Answer:
A
Chapter: 136
Q1928:
Fill in the blank: A burst error affects _______ bits in a data unit, typically caused by interference.
A. one
B. two
C. five
D. ten
Correct Answer:
B
Chapter: 136
Q1929:
In data transmission, what does a burst error indicate?
A. Multiple bits in a data unit have changed due to interference
B. Only one bit in a data unit has changed
C. No bits have been altered
D. The signal has been lost
Correct Answer:
A
Chapter: 136
Q1930:
What is the primary cause of both single-bit and burst errors in data transmission?
A. Interference
B. Encryption
C. Compression
D. Protocol errors
Correct Answer:
A
Chapter: 136
Q1931:
What happens when two or more bits in a data unit are changed during transmission?
A. It's a burst error
B. A single-bit error occurs
C. No error occurs
D. The data unit is discarded
Correct Answer:
A
Chapter: 136
Q1932:
Fill in the blank: In the case of a burst error, _______ or more bits change in a data unit.
A. one
B. two
C. five
D. ten
Correct Answer:
B
Chapter: 137
Q1933:
What is the central concept in detecting or correcting errors in data transmission?
A. Encryption
B. Redundancy
C. Compression
D. Transmission speed
Correct Answer:
B
Chapter: 137
Q1934:
In error detection, what are we primarily looking for?
A. The number of corrupted bits
B. The exact location of errors
C. Whether any error has occurred
D. Correction of errors
Correct Answer:
C
Chapter: 137
Q1935:
What is the main difference between error detection and error correction?
A. Error detection only checks for errors, while error correction identifies the number and location of errors
B. Error detection corrects errors, while error correction only identifies them
C. Error detection looks for specific errors, while error correction looks for any error
D. Error detection and error correction are the same
Correct Answer:
A
Chapter: 137
Q1936:
Fill in the blank: Redundant bits allow the receiver to _______ corrupted bits.
A. detect
B. correct
C. remove
D. ignore
Correct Answer:
A
Chapter: 137
Q1937:
Which of the following is true about error detection?
A. It helps to detect if any error has occurred but does not provide the number or location of corrupted bits
B. It provides the exact number of corrupted bits
C. It automatically corrects errors
D. It checks the exact location of errors
Correct Answer:
A
Chapter: 137
Q1938:
What does error correction require that error detection does not?
A. The number of corrupted bits and their location
B. The ability to detect any error
C. No extra bits
D. Information about the sender's address
Correct Answer:
A
Chapter: 137
Q1939:
Fill in the blank: The presence of redundant bits in a message helps to _______ corrupted bits.
A. detect
B. correct
C. ignore
D. encrypt
Correct Answer:
B
Chapter: 137
Q1940:
Which of the following is a challenge in error correction?
A. Detecting the error location
B. Finding the exact number of corrupted bits
C. Preventing errors from occurring
D. All of the above
Correct Answer:
B