Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1991: Fill in the blank: In Block Coding, a message is divided into blocks, and redundant bits are added to create _______.
- A: datawords
- B: codewords
- C: blockwords
- D: messagewords
View Answer
B
Q1992: What happens when the receiver finds an invalid codeword in Block Coding?
- A: The error is detected and the system corrects the error
- B: The error is ignored, and transmission continues
- C: The system re-sends the codeword
- D: The system continues with the valid data
View Answer
A
Q1993: In Block Coding, if the receiver has a valid list of codewords, what can be detected?
- A: An invalid codeword
- B: Error-free transmission
- C: Correct codewords
- D: Valid datawords
View Answer
A
Q1994: What is an example of how to derive a codeword from a dataword in Block Coding?
- A: By appending redundant bits to the dataword
- B: By subtracting the redundant bits from the dataword
- C: By converting the dataword into binary format
- D: By encoding the dataword using a different algorithm
View Answer
A
Q1995: Fill in the blank: In Block Coding, the length of the codeword is equal to the sum of the number of data bits ‘k’ and the number of _______ bits ‘r’.
- A: encoded
- B: redundant
- C: signal
- D: valid
View Answer
B
Q1996: What is the first step in the error detection process for Block Coding?
- A: The receiver checks if the codeword is valid
- B: The message is divided into datawords
- C: The redundant bits are removed from the codeword
- D: The data is converted into codewords
View Answer
A
Q1997: What happens when a dataword is changed to an invalid codeword in Block Coding?
- A: An error is detected
- B: Transmission continues normally
- C: The message is decoded successfully
- D: The system will wait for a correction
View Answer
A
Q1998: What is the relationship between datawords and codewords in Block Coding?
- A: Codewords are formed by adding redundant bits to the datawords
- B: A dataword and a codeword are the same
- C: The datawords are encoded directly into codewords
- D: None of the above
View Answer
A
Q1999: What does Hamming Distance measure?
- A: The number of bits in a codeword
- B: The number of bits that are different between two words
- C: The number of bits in a dataword
- D: The total length of a codeword
View Answer
B
Q2000: In the context of Hamming Distance, what does d(x,y) represent?
- A: The number of bits in a codeword
- B: The number of bit differences between two words
- C: The total number of valid codewords
- D: The length of the dataword
View Answer
B