This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Error Detection and Correction”.
1. Which needs re-sending of signal?
a) Error correction
b) Error detection
c) Error correction & detection
d) None of the mentioned
View Answer
Explanation: Error detection needs re-sending of data.
2. Which needs more check bits?
a) Error correction
b) Error detection
c) Error correction & detection
d) None of the mentioned
View Answer
Explanation: Error correction needs more check bits where as error detection needs less check bits.
3. Which gets less affected by noise?
a) Error correction
b) Error detection
c) Error correction & detection
d) None of the mentioned
View Answer
Explanation: Error detection is less affected by noise.
4. Which is used to protect privacy of the information?
a) Compression coding
b) Source coding
c) Cipher coding
d) None of the mentioned
View Answer
Explanation: Cipher coding is used to provide privacy for the information.
5. Digital signals are easy for
a) Storage
b) Handling
c) Time dilation
d) All of the mentioned
View Answer
Explanation: Digital signals have ease of handing, storage and time dilation.
6. Which are forward error correcting codes?
a) Block codes
b) Convolutional codes
c) Block & Convolutional codes
d) None of the mentioned
View Answer
Explanation: Block codes and convolutional codes are examples of forward error correcting codes.
7. Which operates on continuous stream of data?
a) Block codes
b) Convolutional codes
c) Block & Convolutional codes
d) None of the mentioned
View Answer
Explanation: Convolutional codes operates on a continuous stream of data.
8. Which is more complex?
a) Encoding
b) Decoding
c) Encoding & Decoding
d) None of the mentioned
View Answer
Explanation: In the case of block codes, decoding is a complex method.
9. Which has better minimum distance?
a) Check sum
b) Cyclic redundancy check
c) Check sum & Cyclic redundancy check
d) None of the mentioned
View Answer
Explanation: Cyclic redundancy check has better distances.
10. In symmetric key cryptosystem, who knows the key?
a) Sender
b) Receiver
c) Sender & Receiver
d) None of the mentioned
View Answer
Explanation: In symmetric key cryptosystem, both sender and receiver knows the same key.
Sanfoundry Global Education & Learning Series – Digital Communications.
To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.
