Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2051: How many valid codewords are there in a simple parity-check code C(5, 4)?
- A: 4
- B: 8
- C: 16
- D: 32
View Answer
C
Q2052: What happens if the total number of 1s in a codeword is odd in a system using even parity?
- A: The codeword is accepted
- B: The codeword is rejected
- C: An error is detected
- D: The codeword is decrypted
View Answer
C
Q2053: Which tool is responsible for adding the parity bit during encoding?
- A: Decoder
- B: Encoder
- C: Parity calculator
- D: Error corrector
View Answer
B
Q2054: In a parity-check code, what is the role of the decoder?
- A: Add parity bits
- B: Check if the codeword is valid
- C: Convert data to binary
- D: Reverse the data sequence
View Answer
B
Q2055: The use of even parity in simple parity-check codes means that _______.
- A: The total number of 1s should be odd
- B: The total number of 0s should be odd
- C: The total number of 1s should be even
- D: The total number of 0s should be even
View Answer
C
Q2056: Fill in the blank: The C(5, 4) parity-check code is designed to detect _______ error.
- A: no
- B: single-bit
- C: multiple-bit
- D: irreversible
View Answer
B
Q2057: What is the unique property of special linear block codes?
- A: They are encrypted with private keys
- B: They use double parity
- C: They allow cyclic shifts of codewords
- D: They eliminate all errors
View Answer
C
Q2058: What happens when a codeword in a cyclic code is left-shifted?
- A: It becomes invalid
- B: It becomes another codeword
- C: It is shortened by one bit
- D: It becomes random
View Answer
B
Q2059: Fill in the blank: A linear block code is considered cyclic if a _______ of any codeword results in another valid codeword.
- A: bit-flip
- B: rotation
- C: removal
- D: addition
View Answer
B
Q2060: Which of the following is a valid property of a cyclic code?
- A: Parity of codewords changes
- B: Codewords must be of variable length
- C: Cyclic shift results in another valid codeword
- D: Codes are encrypted
View Answer
C