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1 | |
Which of the following best describes a single-bit error? |
|
| | A) | A single bit is inverted. |
| | B) | A single bit is inverted per transmission. |
| | C) | A single bit is inverted per data unit. |
| | D) | Any of the above |
|
2 | |
Which error detection method uses ones complement arithmetic? |
|
| | A) | Simple parity check |
| | B) | Checksum |
| | C) | Two-dimensional parity check |
| | D) | CRC |
|
3 | |
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 |
|
4 | |
Which error detection method involves polynomials? |
|
| | A) | CRC |
| | B) | Simple parity check |
| | C) | Two-dimensional parity check |
| | D) | Checksum |
|
5 | |
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 |
|
6 | |
If the ASCII character H is sent and the character I is received, what type of error is this? |
|
| | A) | Burst |
| | B) | Recoverable |
| | C) | Single-bit |
| | D) | Multiple-bit |
|
7 | |
In cyclic redundancy checking, what is the CRC? |
|
| | A) | The remainder |
| | B) | The divisor |
| | C) | The quotient |
| | D) | The dividend |
|
8 | |
Which error detection method involves the use of parity bits? |
|
| | A) | Simple parity check |
| | B) | Two-dimensional parity check |
| | C) | CRC |
| | D) | (a) and (b) |
|
9 | |
In cyclic redundancy checking, the divisor is _______ the CRC. |
|
| | A) | The same size as |
| | B) | 1 bit more than |
| | C) | 1 bit less than |
| | D) | 2 bits more than |
|
10 | |
If the data unit is 111111, the divisor 1010, and the remainder 110, what is the dividend at the receiver? |
|
| | A) | 111111011 |
| | B) | 1010110 |
| | C) | 111111110 |
| | D) | 110111111 |
|
11 | |
Which error detection method consists of a parity bit for each data unit as well as an entire data unit of parity bits? |
|
| | A) | Simple parity check |
| | B) | Checksum |
| | C) | Two-dimensional parity check |
| | D) | CRC |
|
12 | |
If the data unit is 111111 and the divisor 1010, what is the dividend at the transmitter? |
|
| | A) | 1111110000 |
| | B) | 111111000 |
| | C) | 111111 |
| | D) | 1111111010 |
|
13 | |
If odd parity is used for ASCII error detection, the number of 0s per 8-bit symbol is _______. |
|
| | A) | Indeterminate |
| | B) | 42 |
| | C) | Even |
| | D) | Odd |
|
14 | |
In CRC there is no error if the remainder at the receiver is _______. |
|
| | A) | Nonzero |
| | B) | The quotient at the sender |
| | C) | Equal to the remainder at the sender |
| | D) | Zero |
|
15 | |
At the CRC generator, _______ added to the data unit after the division process. |
|
| | A) | 0s are |
| | B) | 1s are |
| | C) | The CRC remainder is |
| | D) | The polynomial is |
|
16 | |
The sum of the checksum and data at the receiver is _______ if there are no errors. |
|
| | A) | -0 |
| | B) | +0 |
| | C) | The complement of the checksum |
| | D) | The complement of the data |
|
17 | |
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 |
|
18 | |
The Hamming code is a method of _______. |
|
| | A) | Error detection |
| | B) | Error correction |
| | C) | Error encapsulation |
| | D) | (a) and (b) |
|
19 | |
At the CRC checker, _______ means that the data unit is damaged. |
|
| | A) | A string of alternating 1s and 0s |
| | B) | A nonzero remainder |
| | C) | A string of 0s |
| | D) | A string of 1s |
|
20 | |
Which error detection method can detect a single-bit error? |
|
| | A) | Simple parity check |
| | B) | Two-dimensional parity check |
| | C) | CRC |
| | D) | All the above |
|
21 | |
Which error detection method can detect a burst error? |
|
| | A) | The parity check |
| | B) | Two-dimensional parity check |
| | C) | CRC |
| | D) | (b) and (c) |
|
22 | |
At the CRC generator, _______ added to the data unit before the division process. |
|
| | A) | A polynomial is |
| | B) | A CRC remainder is |
| | C) | 0s are |
| | D) | 1s are |