Verification

Question 1

What is verification?

Answer 1

-Process of checking data entered onto a computer system matches the original source.

Question 2

What is a visual check?

Answer 2

-Reading the data displayed on screen, comparing with the original data. If it matches, it passes.

Question 3

What happens if data is wrong in the original source?

Answer 3

-Verification alone will not ensure data is correct. If it is wrong on the original source, it will pass the checks.

Question 4

What is double data entry?

Answer 4

-Data is imputed twice, two data items are compared to see if they matched eg. password for email address

Question 5

What is hash total?

Answer 5

-When entering/inputing data a hash total is calculated by adding value from an input field together.
-User manually adds up the values.
-Once data is entered/inputed, computer will compare the hash totals.
-If it matches the manual hash total, it is accepted.

Question 6

What is control total?

Answer 6

-Used a field with meaning eg. number of batches

Question 7

What is a parity check?

Answer 7

(different than others)
-Used to find errors during data transmission (each byte), checked individually.
-2 types:
-ODD parity: total number of bits (1010) in a byte (1s or 0s) must be an odd number.
-EVEN parity: total number of bits in a byte must be an even number.
-Only checks for errors on transmission, does not correct it.

Question 8

What is a check sum?