2.3

Question 1

What is validation?

Answer 1

The checking of data on input to ensure that it is sensible

Question 2

What is a range check?

Answer 2

Checks that a number/date is in the allowed range

Question 3

What is a type check?

Answer 3

Checks that the data is the right type- integer/character/string

Question 4

What is a length check?

Answer 4

Checks that the text entered isn’t too long or too short

Question 5

What is a presence check?

Answer 5

Checks that data has been entered

Question 6

What is a format check?

Answer 6

Checks that the format is appropriate- postcode, email address, etc

Question 7

What is verification?

Answer 7

The input of data twice- If they match, the entry is accepted as valid

Question 8

What is authentication?

Answer 8

A process used to test that a person is who they claim to be- e.g biometrics

Question 9

What are some considerations in defensive design?

Answer 9

anticipating misuse/ authentication

Question 10

What is the point of indentation?

Answer 10

aids readability and is mandatory in some programming languages

Question 11

What is the point of commenting?

Answer 11

to help ensure the program can be understood and maintained long after it was written

Question 12

What is the purpose of testing?

Answer 12

To ensure that for any input, the program always works correctly

Question 13

What is iterative testing?

Answer 13

finding and correcting errors in the program until all tests give the expected results. This is done during development

Question 14

What is final/terminal testing?

Answer 14

Carried out by users after the program is completely finished.

Question 15

What should test data include?

Answer 15

normal data, boundary data, invalid data, erroneous data

Question 16

What is boundary data?

Answer 16

data that includes both ends of an allowed range and data just outside the range which shouldn’t be allowed

Question 17

What is invalid data?

Answer 17

Data outside the limits of valid data

Question 18

What is erroneous data?

Answer 18

Completely wrong data- like a number when it is meant to be a word

Question 19

What do refining algorithms do?

Answer 19

Make programs more efficient- for example, ending the program when there have been no swaps in a single pass reduces the execution time, as there are no unnecessary passes after the list is already sorted