Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2021: In a Linear Block Code, what happens when two valid codewords are XORed together?
- A: The result is an invalid codeword
- B: The result is another valid codeword
- C: The result is a random sequence
- D: The result is the same codeword
View Answer
B
Q2022: What is the main characteristic of a Linear Block Code?
- A: Bitwise AND operation produces a valid codeword
- B: Exclusive OR of two valid codewords produces another valid codeword
- C: Exclusive OR of any two codewords produces an invalid codeword
- D: None of the above
View Answer
B
Q2023: Fill in the blank: The minimum Hamming distance \( d_{\text{min}} \) in a code defines the _______ between any two codewords.
- A: smallest difference
- B: smallest distance
- C: smallest error
- D: smallest error detection
View Answer
B
Q2024: Which of the following is true for Linear Block Codes?
- A: Only XORing identical codewords creates valid codewords
- B: XORing any codeword with any other valid codeword creates another valid codeword
- C: No codeword can be generated by XORing two valid codewords
- D: None of the above
View Answer
B
Q2025: What is the result of XORing two codewords with a minimum Hamming distance of 2?
- A: A codeword with Hamming distance 2
- B: A codeword with Hamming distance 1
- C: A valid codeword
- D: An invalid codeword
View Answer
D
Q2026: Fill in the blank: In error detection, the minimum Hamming distance \( d_{\text{min}} \) helps to determine the _______ that can be reliably detected.
- A: errors
- B: changes
- C: differences
- D: bits
View Answer
A
Q2027: How is the error detection capability of a code related to its \( d_{\text{min}} \)?
- A: The error detection capability decreases with higher \( d_{\text{min}} \)
- B: The error detection capability increases with higher \( d_{\text{min}} \)
- C: The error detection capability is not related to \( d_{\text{min}} \)
- D: The error detection capability is constant
View Answer
B
Q2028: Fill in the blank: The exclusive OR (XOR) operation is used to check the _______ between two valid codewords in a Linear Block Code.
- A: relationship
- B: similarity
- C: errors
- D: differences
View Answer
C
Q2029: What is the relationship between the number of detectable errors \( s \) and the minimum Hamming distance \( d_{\text{min}} \)?
- A: \( d_{\text{min}} = 2s \)
- B: \( d_{\text{min}} = s \)
- C: \( d_{\text{min}} = s + 1 \)
- D: \( d_{\text{min}} = s - 1 \)
View Answer
C
Q2030: If \( d_{\text{min}} = 2 \) for a code, how many errors can it detect?
- A: 1
- B: 2
- C: 3
- D: 4
View Answer
A