Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q831: What is the purpose of HDB3 scrambling technique?
- A: to maintain synchronization while avoiding long sequences of zeros
- B: to reduce bandwidth
- C: to encrypt data
- D: to compress data
View Answer
A
Q832: Which of the following is a result of using B8ZS in data transmission?
- A: Improved synchronization
- B: Lower data integrity
- C: Higher error rates
- D: Reduced security
View Answer
A
Q833: Two common scrambling techniques are _______ and HDB3.
- A: B8ZS
- B: NRZ-I
- C: AMI
- D: Bipolar
View Answer
A
Q834: Bipolar with 8-Zero Substitution (B8ZS) is a type of _______.
- A: scrambling technique
- B: encoding technique
- C: error correction technique
- D: line coding technique
View Answer
A
Q835: High-density bipolar (HDB3) is another common scrambling technique used to solve _______.
- A: synchronization issues
- B: data compression errors
- C: encryption problems
- D: network congestion
View Answer
A
Q836: Which of the following scrambling techniques is commonly used for data transmission?
- A: B8ZS
- B: HDB3
- C: NRZ-I
- D: AMI
View Answer
B
Q837: HDB3 is designed to solve the issue of _______ in long-distance data transmission.
- A: synchronization
- B: security
- C: bandwidth
- D: noise
View Answer
A
Q838: B8ZS and HDB3 are examples of _______.
- A: encoding techniques
- B: scrambling techniques
- C: error correction techniques
- D: line coding techniques
View Answer
B
Q839: Which of the following is a primary advantage of using scrambling techniques like B8ZS and HDB3?
- A: Improved synchronization
- B: reduced noise
- C: enhanced security
- D: greater bandwidth
View Answer
A
Q840: In HDB3, long sequences of zeros are replaced with _______ patterns to ensure synchronization.
- A: special
- B: identical
- C: alternating
- D: random
View Answer
A