Error Detection and Correction
1. Which error detection method uses one's complement arithmetic?
A.  Simple parity check B.  Two-dimensional parity check C.  CRC D.  Checksum
2. Which error detection method consists of just one redundant bit per data unit?
A.  Simple parity check B.  Two-dimensional parity check C.  CRC D.  Checksum
3. In cyclic redundancy checking, what is the CRC?
A.  The divisor B.  The quotient C.  The dividend D.  The remainder
4. In cyclic redundancy checking, the divisor is _______ the CRC
A.  The same size as B.  one bit less than C.  one bit more than D.  none of the above
5. A burst error means that two or more bits in the data unit have changed.
A.  double-bit B.  burst C.  single-bit D.  none of the above
6. In ________ error correction, the receiver corrects errors without requesting retransmission.
A.  backward B.  onward C.  forward D.  none of the above
7. In ________ error correction, the receiver asks the sender to send the data again.
A.  backward B.  retransmission C.  forward D.  none of the above
8. In modulo-2 arithmetic, __________ give the same results.
A.  addition and multiplication B.  addition and division C.  addition and subtraction D.  none of the above
9. . In modulo-2 arithmetic, we use the ______ operation for both addition and subtraction.
A.  XOR B.  OR C.  AND D.  none of the above
10. We add r redundant bits to each block to make the length n = k + r. The resulting n-bit blocks are called _________
A.  datawords B.  blockwords C.  codewords D.  none of the above