Digital Communications

Error Detection and Correction 2

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which has better minimum distance?
Check sum
Cyclic redundancy check
Check sum & Cyclic redundancy check
None of the mentioned
Explanation:
Cyclic redundancy check has better distances.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Digital signals are easy for
Storage
Handling
Time dilation
All of the mentioned
Explanation:
Digital signals have ease of handing, storage and time dilation.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
In symmetric key cryptosystem, who knows the key?
Sender
Receiver
Sender & Receiver
None of the mentioned
Explanation:
In symmetric key cryptosystem, both sender and receiver knows the same key.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Which gets less affected by noise?
Error correction
Error detection
Error correction & detection
None of the mentioned
Explanation:
Error detection is less affected by noise.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Which needs re-sending of signal?
Error correction
Error detection
Error correction & detection
None of the mentioned
Explanation:
Error detection needs re-sending of data.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which is more complex?
Encoding
Decoding
Encoding & Decoding
None of the mentioned
Explanation:
In the case of block codes, decoding is a complex method.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which is used to protect privacy of the information?
Compression coding
Source coding
Cipher coding
None of the mentioned
Explanation:
Cipher coding is used to provide privacy for the information.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which needs more check bits?
Error correction
Error detection
Error correction & detection
None of the mentioned
Explanation:
Error correction needs more check bits where as error detection needs less check bits.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which are forward error correcting codes?
Block codes
Convolutional codes
Block & Convolutional codes
None of the mentioned
Explanation:
Block codes and convolutional codes are examples of forward error correcting codes.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which operates on continuous stream of data?
Block codes
Convolutional codes
Block & Convolutional codes
None of the mentioned
Explanation:
Convolutional codes operates on a continuous stream of data.