3.2 Testing

Question 1

What are the purposes of testing

Answer 1

‘The main purpose of testing is to ensure that a program works correctly no matter what input has been entered by the user.

Other reasons to test a program include ensuring the user requirements have been met, errors have been removed and the program
doesn’t crash while running.

Question 2

What are the two types of program testing

Answer 2

. Iterative testing
. Final Testing

Question 3

Iterative Testing

Answer 3

Iterative testing takes place during
program development.

The programmer develops a module,
tests it and repeats this process until the
module works as expected.

Question 4

Final Testing

Answer 4

Final testing, also known as terminal
testing, takes place after development
and before the program is released to
the end user.

This testing takes place once all modules
have been individually tested to ensure
the whole program works as originally
expected.

Question 5

Syntax Error

Answer 5

A syntax error is a mistake in the grammar or spelling of the
program.

A syntax error will prevent the program from being compiled.

Question 6

Logic Error

Answer 6

A logical error is a mistake made by the programmer - the program
still works but displays the wrong output.

Question 7

What is Test Data

Answer 7

Test data is used to test whether a program is functioning correctly.

It should cover a range of possible and incorrect inputs, each designed to prove a program works or to highlight any flaws.

Question 8

What are the three types of Test Data

Answer 8

. Normal data
. Boundary data
. Invalid data

Question 9

Normal data

Answer 9

Sensible data that the program should accept and be able to process.

Question 10

Boundary data

Answer 10

Data at the extreme boundary of any data ranges.

Question 11

Invalid data

Answer 11

Data that the program cannot process and should not accept.