Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
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
View Answer
A
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
View Answer
B
Q1933: What is the central concept in detecting or correcting errors in data transmission?
- A: Encryption
- B: Redundancy
- C: Compression
- D: Transmission speed
View Answer
B
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
View Answer
C
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
View Answer
A
Q1936: Fill in the blank: Redundant bits allow the receiver to _______ corrupted bits.
- A: detect
- B: correct
- C: remove
- D: ignore
View Answer
A
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
View Answer
A
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
View Answer
A
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
View Answer
B
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
View Answer
B