This is the Online Practice Quiz in Error Detection and Correction part 3 from the book, Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in Electronics Systems and Technologies (Communications Engineering) this will definitely help you test your knowledge and skill before taking the Board Exam.

### Continue Part III of the Online Practice Quiz

#### Quiz in Error Detection and Correction
**Question 21. In ________ error correction, the receiver asks the sender to send the data again. **
**Question 22. We add r redundant bits to each block to make the length n = k + r. The resulting n-bit blocks are called _________. **
**Question 23. _______codes are special linear block codes with one extra property. If a codeword is rotated, the result is another codeword. **
**Question 24. The divisor in a cyclic code is normally called the _________. **
**Question 25. Which error detection method consists of just one redundant bit per data unit? **
**Question 26. In a linear block code, the _______ of any two valid codewords creates another valid codeword. **
**Question 27. The _______of errors is more difficult than the ______. **
**Question 28. A _____ error means that two or more bits in the data unit have changed. **
**Question 29. In block coding, if k = 2 and n = 3, we have _______ invalid codewords. **
**Question 30. Which error detection method uses one's complement arithmetic? **
**Question 31. The checksum of 0000 and 0000 is __________. **
**Question 32. In modulo-2 arithmetic, __________ give the same results. **
**Question 33. To guarantee correction of up to 5 errors in all cases, the minimum Hamming distance in a block code must be ________. **
**Question 34. In modulo-11 arithmetic, we use only the integers in the range ______, inclusive. ** |

### More Practice Quiz in Error Detection and Correction

**Practice Quiz Part 1**

**Practice Quiz Part 2**

**Practice Quiz Part 3**

### Complete Practice Quiz in Data Communications and Networking

Note: After taking this particular quiz, you can proceed to check all the topics.

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