Validation and verification

Question 1

What is validation?

Answer 1

Testing if the data entered is possible or reasonable

Question 2

What are the 4 main validation checks?

Answer 2

range, length, type, check digit

Question 3

What is verification?

Answer 3

It is checking that data was not changed on entry

Question 4

What are the (4) verification checks?

Answer 4

double entry , screen/visual check , parity check, checksum.

Question 5

What is the diffference between validation and verification?

Answer 5

Validation checks that the data is possible. It can’t check if the data was entered correcty

Verification checks if the data entered matches the data submitted for entry. It doesn;t check if the data meets set criteria

Question 6

Range checks

Answer 6

Used to test if the value input falls between a given upper bound and a given lower bound

Question 7

Example of range check

Answer 7

Percentage marks should be between 0 and 100 inclusive

Question 8

Length check

Answer 8

To test if data input is over or under a certain number of characters

Question 9

Example of length check

Answer 9

An international telephone number can be no longer than 15 digits

Question 10

Type check

Answer 10

Used to test if the data input is of the correct data type

Question 11

Example of type check

Answer 11

If the input is expecting an integer, it will not permit a string to be entered

Question 12

Character check

Answer 12

Used to test if a string of characters is entered doesn’t have any invalid characters or symbols

Question 13

Example of character check

Answer 13

A name should not contain a % sign

Question 14

Format check

Answer 14

Used to test if the characters entered conform to a pre-defined pattern

Question 15

Presence check

Answer 15

Used to test if some data has been entered and the value has not been left blank

Question 16

Example of presence check

Answer 16

An email address must be given for an online transaction

Question 17

What are the other validation checks?

Answer 17

Character, format, presence

Question 18

Double entry

Answer 18

The data is entered twice and the two values are compared to see if they are the same. The value is only accepted if the two values are identical

Question 19

Screen/visual check

Answer 19

After data entry is complete, the data is displayed on the screen and the user is asked to confirm if it is correct before continuing

Question 20

Why is verification needed?

Answer 20

It is needed to check that data was entered as intended and that incorrect values that meet validation criteria are not accepted