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Computer Networks: Error Detection and Correction MCQs
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Computer Networks: Error Detection and Correction MCQs
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25 Questions

1. In subtraction of modulo-2 arithmetic, 0-1 =
2. There are two main methods of
3. If generator of the cyclic code has at least two terms and the rightmost bit is 1 then error cannot be divided by
4. Single-bit errors are the least likely type of error in
5. The checksum is used in the Internet by several protocols although not at the
6. To guarantee the detection of up to s errors in all cases, the minimum hamming distance in a block code must be
7. If the value of checksum is 0, then the message is
8. The divisor line and XOR are missing if the corresponding bit in the divisor is
9. In a cyclic code, generator polynomial is actually the
10. A generator of a cyclic code that contains a factor of x + 1 can detect all
11. How many bits in the data unit has changed in single bit error?
12. The cyclic redundancy check is used in
13. What is the maximum effect of a 2-ms burst of noise on data transmitted for 12 kbps?
14. Forward error correction is possible when the number of errors is
15. To guarantee correction of up to t errors in all cases, the minimum hamming distance in a block code must be
16. In block coding, we divide our message into blocks, is called
17. Traditionally, the Internet checksum is
18. A good polynomial generator of the cyclic code have at least
19. To detect or correct errors, we send extra bits with data. It is called
20. In a linear block code, the exclusive OR (XOR) of any two valid code words creates
21. In modulo-N arithmetic, we use only the integers in the range
22. The dataword is organized in the form of
23. The Internet has been using a checksum of
24. A simple parity-check code is the most familiar
25. All burst errors of a cyclic code will be detected when

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