Freshers — Test 1
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Question 1
What are the bits transmitted for the return to zero system?
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Question 2
What are the bits transmitted in the differential Manchester coding?
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Question 3
What are the bits transmitted for the AMI and Pseudoternary System?
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Question 4
Five channels, each with a 100-kHz bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10 kHz between the channels to prevent interference?
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Question 5
Find the checksum byte for the fallowing data words: 10110011, 10101011, 01011010, 11010101
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Question 6
Generate the CRC codeword for the message x3+1 using the generator polynomial x3+x+1.
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Question 7
What is the hamming distance between these 2 codes: 10010010 and 11011001?
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Question 8
What is the hamming code for the data: 1001101?
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Question 9
10010100101 is the code received. Find the error bit.
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Question 10
The channel capacity is 100Mbps, the frame length is 10000 bits and the arrival rate is 5000 frames/sec. Calculate the mean time delay.
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