6.2 Data integrity

Question 1

Data integrity

Answer 1

the accuracy, completeness and consistency of data

Question 2

Validation

Answer 2

method used to ensure entered data is reasonable and meets certain input criteria

Question 3

Verification

Answer 3

method used to ensure data is correct by using double entry or visual checks

Question 4

Check digit

Answer 4

additional digit appended to a number to check if entered data is error free

Question 5

Modulo-11

Answer 5

method used to calculate a check digit based on modulus division by 11

Question 6

Checksum

Answer 6

verification method used to check if data transferred has been altered or corrupted, calculated from the block of data to be sent

Question 7

Parity check

Answer 7

method used to check data has been transferred correctly that uses even or odd parity

Question 8

Parity bit

Answer 8

an extra bit found at the end of a byte that is set to 1 if the parity of the byte needs to change to agree with sender or receiver protocol

Question 9

Odd parity

Answer 9

binary number with an odd number of 1-bits

Question 10

Even parity

Answer 10

binary number with an even number of 1-bits

Question 11

Parity block

Answer 11

horizontal and vertical parity check on a block of data being transferred

Question 12

Parity byte

Answer 12

additional byte sent with transmitted data to enable vertical parity checking (as well as horizontal parity checking) to be carried out

Question 13

Automatic repeat request (ARQ)

Answer 13

a type of verification check

Question 14

Acknowledgement

Answer 14

message sent to a receiver to indicate that data has been received without error

Question 15

Timeout

Answer 15

time allowed to elapse before an acknowledgement is received