Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 64
Q821:
Which of the following is the characteristic of Bipolar AMI?
A. No DC component and synchronization issue
B. Long sequence of 1s
C. High bandwidth
D. Continuous pulse
Correct Answer:
A
Chapter: 65
Q822:
Two common scrambling techniques are _______ and HDB3.
A. B8ZS
B. NRZ-I
C. AMI
D. Bipolar
Correct Answer:
A
Chapter: 65
Q823:
Bipolar with 8-Zero Substitution (B8ZS) is a type of _______.
A. scrambling technique
B. encoding technique
C. error correction technique
D. line coding technique
Correct Answer:
A
Chapter: 65
Q824:
The main purpose of B8ZS is to solve _______ issues in data transmission.
A. synchronization
B. security
C. error detection
D. flow control
Correct Answer:
A
Chapter: 65
Q825:
Which of the following is the second common scrambling technique mentioned in the content?
A. B8ZS
B. NRZ-I
C. HDB3
D. AMI
Correct Answer:
C
Chapter: 65
Q826:
B8ZS is primarily used in _______ networks.
A. telecommunication
B. Wi-Fi
C. WiMAX
D. LAN
Correct Answer:
A
Chapter: 65
Q827:
Which technique replaces a sequence of eight consecutive zeros with a special pattern?
A. B8ZS
B. HDB3
C. NRZ-I
D. AMI
Correct Answer:
A
Chapter: 65
Q828:
Which of the following is not a scrambling technique mentioned in the content?
A. B8ZS
B. NRZ-I
C. HDB3
D. AMI
Correct Answer:
B
Chapter: 65
Q829:
In Bipolar with 8-Zero Substitution (B8ZS), the '8' refers to _______.
A. the number of consecutive zeros
B. substitution technique
C. encoding technique
D. none of the above
Correct Answer:
A
Chapter: 65
Q830:
B8ZS solves synchronization issues by replacing sequences of _______ zeros.
A. eight
B. five
C. three
D. twelve
Correct Answer:
A
Chapter: 65
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
Correct Answer:
A
Chapter: 65
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
Correct Answer:
A
Chapter: 66
Q833:
Two common scrambling techniques are _______ and HDB3.
A. B8ZS
B. NRZ-I
C. AMI
D. Bipolar
Correct Answer:
A
Chapter: 66
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
Correct Answer:
A
Chapter: 66
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
Correct Answer:
A
Chapter: 66
Q836:
Which of the following scrambling techniques is commonly used for data transmission?
A. B8ZS
B. HDB3
C. NRZ-I
D. AMI
Correct Answer:
B
Chapter: 66
Q837:
HDB3 is designed to solve the issue of _______ in long-distance data transmission.
A. synchronization
B. security
C. bandwidth
D. noise
Correct Answer:
A
Chapter: 66
Q838:
B8ZS and HDB3 are examples of _______.
A. encoding techniques
B. scrambling techniques
C. error correction techniques
D. line coding techniques
Correct Answer:
B
Chapter: 66
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
Correct Answer:
A
Chapter: 66
Q840:
In HDB3, long sequences of zeros are replaced with _______ patterns to ensure synchronization.
A. special
B. identical
C. alternating
D. random
Correct Answer:
A