Taher DCC 10

A codeword of 10 bits has only four 0s, how many terms are in the polynomial representation of this code? A) 4 B) 6 C) 8 D) None of the choices are correct

6

To detect five errors, the Hamming distance between each pair of codewords should be at least_________. A) 5 B) 6 C) 11 D) None of the choices are correct

6

The sum of the checksum and data at the receiver is _______ if no error is detected. A) − 0 B) + 0 C) the complement of the checksum D) the complement of the dataword

− 0

Which error detection method consists of just one redundant bit per data unit? A) Two-dimensional parity check B) CRC C) Simple parity check D) Checksum

Simple parity check

If the ASCII character H is sent and the character L is received, what type of error is this? A) Burst B) Recoverable C) Single-bit D) Multiple-bit

Single-bit

At the CRC generator, _______ is (are) added to the dataword after the division process to create the codeword. A) 0's B) 1's C) the remainder D) the divisor

the remainder

If the ASCII character G is sent and the character D is received, what type of error is this? A) Single-bit B) Multiple-bit C) Burst D) Recoverable

Burst

Which error detection method involves polynomials? A) CRC B) Simple parity check C) Two-dimensional parity check D) Checksum

CRC

To correct five errors, the Hamming distance between each pair of codewords should be at least_________. A) 5 B) 6 C) 11 D) None of the choices are correct

11

In CRC, if the dataword is 111111 and the divisor 1010, what is the dividend at the sender? A) 1111110000 B) 111111000 C) 111111 D) 1111111010

111111000

In CRC, if the dataword is 111111, the divisor 1010, and the remainder 110, what is the codeword at the receiver? A) 111111011 B) 1010110 C) 111111110 D) 110111111

111111110

In CRC, if the remainder is only three bits, the divisor should be __________ bits. A) 3 B) 2 C) 4 D) None of the choices are correct

4

How many bits are in the divisor if we use CRC-8? A) 9 B) 8 C) 10 D) None of the choices are correct

9

Which of the following best describes a single-bit error? A) A single bit is inverted B) A single bit per transmission is inverted C) A single bit per data unit is inverted D) All of the choices are correct

A single bit per transmission is inverted

Which error detection method uses one's complement arithmetic? A) Simple parity check B) Checksum C) Two-dimensional parity check D) CRC

Checksum

In cyclic redundancy checking, what forms the check bits? A) The remainder B) The divisor C) The quotient D) The dividend

The remainder

At the CRC checker, _______ means that the dataword is damaged. A) a string of alternating 1s and 0s B) a nonzero remainder C) a string of 0s D) None of the choices are correct

a nonzero remainder

A checksum can _________ errors. A) only detect B) only correct C) both detect and correct D) None of the choices are correct

both detect and correct

In CRC, the quotient at the sender _______. A) becomes the dividend at the receiver B) becomes the divisor at the receiver C) is the remainder D) is discarded

is discarded

Checksum uses ____________ addition. A) one's complement B) two's complement C) three's complement D) None of the choices are correct

one's complement