Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 56
Q741:
Which of the following data types can be stored as digital data?
A. Only text
B. Only video
C. Text, pictures, and audio
D. None of the above
Correct Answer:
C
Chapter: 56
Q742:
Fill in the blank: Digital data stored in computer memory consists of sequences of _______.
A. Frames
B. Bytes
C. Bits
D. Signals
Correct Answer:
C
Chapter: 56
Q743:
What is required to decode digital signals back to original data?
A. Line decoding
B. Line coding
C. Block coding
D. None of the above
Correct Answer:
A
Chapter: 56
Q744:
Which of the following is NOT a type of digital data?
A. Pictures
B. Audio
C. Sequences of bits
D. Sound waves
Correct Answer:
D
Chapter: 56
Q745:
Fill in the blank: ______ is the process of converting a digital signal back into a bit sequence.
A. Line decoding
B. Scrambling
C. Block coding
D. Pulse coding
Correct Answer:
A
Chapter: 56
Q746:
What is the purpose of converting digital data into digital signals?
A. Storage
B. Transmission
C. Compression
D. Decompression
Correct Answer:
B
Chapter: 56
Q747:
Fill in the blank: In line coding, each bit in the sequence is represented by a _______.
A. Signal element
B. Byte
C. Frame
D. Pulse
Correct Answer:
A
Chapter: 56
Q748:
What happens if line coding is not performed in digital transmission?
A. Data becomes analog
B. Data cannot be transmitted
C. Data gets compressed
D. Data becomes audio
Correct Answer:
B
Chapter: 56
Q749:
Fill in the blank: ______ is an essential component of transmitting digital data over networks.
A. Line coding
B. Analog decoding
C. Modulation
D. Signal coding
Correct Answer:
A
Chapter: 57
Q750:
How many broad categories can line coding schemes be divided into?
A. Two
B. Three
C. Five
D. Seven
Correct Answer:
C
Chapter: 57
Q751:
Which of the following is a category of line coding schemes?
A. Unipolar
B. Polar
C. Both A and B
D. None of the above
Correct Answer:
C
Chapter: 57
Q752:
Fill in the blank: Line coding schemes include ______ and polar schemes.
A. Unipolar
B. Bipolar
C. Multilevel
D. None of the above
Correct Answer:
A
Chapter: 57
Q753:
What is a characteristic of polar line coding?
A. Uses only positive voltages
B. Uses both positive and negative voltages
C. Uses alternating voltages
D. Uses no voltage levels
Correct Answer:
B
Chapter: 57
Q754:
Fill in the blank: ______ line coding uses both positive and negative voltages.
A. Unipolar
B. Polar
C. Bipolar
D. Multilevel
Correct Answer:
B
Chapter: 57
Q755:
What type of line coding uses a single voltage level to represent data?
A. Polar
B. Unipolar
C. Bipolar
D. Multilevel
Correct Answer:
B
Chapter: 57
Q756:
Fill in the blank: Unipolar coding schemes are ______ in terms of power usage compared to polar coding.
A. Less efficient
B. More efficient
C. Equally efficient
D. Not related to efficiency
Correct Answer:
A
Chapter: 57
Q757:
What is a disadvantage of unipolar line coding?
A. Higher signal strength
B. Lack of synchronization
C. Efficient power usage
D. No voltage representation
Correct Answer:
B
Chapter: 57
Q758:
Fill in the blank: ______ line coding schemes use voltage levels to represent both binary 0 and binary 1.
A. Polar
B. Unipolar
C. Multilevel
D. None of the above
Correct Answer:
A
Chapter: 57
Q759:
What is the primary use of unipolar line coding schemes?
A. High-speed data transmission
B. Short-distance communication
C. Long-distance communication
D. Video transmission
Correct Answer:
B
Chapter: 57
Q760:
Fill in the blank: A major limitation of ______ coding is the need for a DC component.
A. Polar
B. Unipolar
C. Multilevel
D. All of the above
Correct Answer:
B