Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 137
Q1941:
Fill in the blank: In error detection, we are only interested in knowing whether _______ occurred.
A. any error has occurred
B. no error has occurred
C. a burst error has occurred
D. a single-bit error has occurred
Correct Answer:
A
Chapter: 137
Q1942:
What is more difficult in the process of error handling?
A. Detection
B. Correction
C. Detection and correction are equally difficult
D. None of the above
Correct Answer:
B
Chapter: 137
Q1943:
In error detection, which of the following is true?
A. We only need to know if any error has occurred
B. We need to know the location and number of corrupted bits
C. We need to know the cause of the error
D. We need to correct the error immediately
Correct Answer:
A
Chapter: 137
Q1944:
Which type of error handling involves finding the exact number of corrupted bits and their location?
A. Error detection
B. Error correction
C. Error isolation
D. Error prevention
Correct Answer:
B
Chapter: 137
Q1945:
Fill in the blank: Error correction requires knowing the _______ of corrupted bits and their _______.
A. number, location
B. number, type
C. cause, location
D. none
Correct Answer:
B
Chapter: 137
Q1946:
What is the role of redundant bits in data transmission?
A. They help to detect and correct errors
B. They help to speed up the transmission
C. They prevent errors from occurring
D. They minimize the size of the data
Correct Answer:
A
Chapter: 137
Q1947:
Which of the following does error detection NOT provide?
A. The exact number of corrupted bits
B. The location of corrupted bits
C. The occurrence of any error
D. Correction of the error
Correct Answer:
A
Chapter: 137
Q1948:
Fill in the blank: In error detection, we are looking to check if _______ has occurred.
A. an error
B. any number of bits changed
C. a correction is needed
D. no error
Correct Answer:
B
Chapter: 137
Q1949:
Which of the following is true about error correction?
A. Error correction requires additional bits to locate and fix errors
B. Error correction only identifies errors without fixing them
C. Error correction occurs automatically without the need for extra bits
D. Error correction happens faster than error detection
Correct Answer:
A
Chapter: 138
Q1950:
What is achieved through coding schemes to ensure data integrity?
A. Encryption
B. Compression
C. Redundancy
D. Transmission speed
Correct Answer:
C
Chapter: 138
Q1951:
Fill in the blank: Redundancy in data transmission is achieved through various _______.
A. algorithms
B. coding schemes
C. protocols
D. interfaces
Correct Answer:
B
Chapter: 138
Q1952:
Which of the following is true about redundancy in data transmission?
A. The sender adds redundant bits to create a relationship between data bits and redundant bits
B. The receiver removes redundant bits to save bandwidth
C. The redundant bits are used for compression purposes
D. Redundancy reduces the robustness of the transmission
Correct Answer:
A
Chapter: 138
Q1953:
Fill in the blank: The ratio of redundant bits to data bits is an important factor in any _______ scheme.
A. coding
B. encryption
C. decoding
D. security
Correct Answer:
A
Chapter: 138
Q1954:
What does a coding scheme involve?
A. Adding redundant bits to data for error detection and correction
B. Compressing data for faster transmission
C. Encrypting data for secure transmission
D. None of the above
Correct Answer:
A
Chapter: 138
Q1955:
Which of the following factors are important in any coding scheme?
A. The ratio of redundant bits to data bits and the robustness of the process
B. The number of data bits only
C. The time taken for transmission only
D. The speed of encoding and decoding
Correct Answer:
A
Chapter: 138
Q1956:
Fill in the blank: Redundant bits in a coding scheme help the receiver to _______ errors.
A. ignore
B. detect
C. correct
D. transfer
Correct Answer:
B
Chapter: 138
Q1957:
Which of the following is NOT a purpose of redundant bits in data transmission?
A. To ensure error-free transmission
B. To reduce the amount of data sent
C. To detect and correct errors
D. To create a relationship between data and redundant bits
Correct Answer:
B
Chapter: 138
Q1958:
Fill in the blank: In a coding scheme, the sender creates a _______ between redundant bits and actual data bits.
A. relationship
B. relationship with encryption
C. partition
D. connection
Correct Answer:
A
Chapter: 138
Q1959:
What is the role of redundant bits in error detection?
A. To allow the receiver to create a relationship between data bits and redundant bits
B. To make data transmission faster
C. To ensure security of data
D. To increase data size
Correct Answer:
A
Chapter: 138
Q1960:
What do coding schemes help to achieve in data transmission?
A. Compression and speed
B. Error detection and correction
C. Encryption of sensitive data
D. Minimizing transmission time
Correct Answer:
B