Unit 2.3. Producing Robust Programs

Question 1

Defensive design

Answer 1

Designing and building computer code that is secure, easy to maintain and robust

Question 2

Authentication

Answer 2

A security mechanism which requires a password, code, fingerprint or other factor to gain access to the system

Question 3

Input Validation

Answer 3

The process of comparing data entered into the program to a set of rules to ensure it can be accepted

Question 4

Maintainability

Answer 4

The ability to keep code updated, fix bugs and add new features easily.

Question 5

Naming Conventions

Answer 5

The way to name variables in a way that is clear and relevant to its purpose

Question 5

Indentation

Answer 5

Inserting spaces at the start of a line or lines of code so to group them together and make the code easier to read.

Question 6

Comment

Answer 6

Lines that are not code themselves but provide notes to the programmer

Question 7

Testing

Answer 7

The process of trialing a program in order to ensure it performs as expected.

Question 8

Iterative testing

Answer 8

Testing which is carried out whilst the program is being developed, so you can catch out mistakes as you go.

Question 9

Final testing

Answer 9

Testing which is carried out at the end of development

Question 10

Syntax Error

Answer 10

An error which breaks the rules of the programming language and means the code can’t run

Question 11

Logic error

Answer 11

An error which produces an unexpected output, but the code still runs.

Question 12

Normal Data

Answer 12

Data which the program should accept without error

Question 13

Boundary Data

Answer 13

Data at the extremes of what the program should accept (e.g. the last number in a range)

Question 14

Invalid Data

Answer 14

Data that is the correct type but is not valid for the program and should be rejected

Question 15

Erroneous Data

Answer 15

Data which is the wrong type and should be rejected