2.3 Producing Robust Programs

Question 1

Types of defensive design and explain them

Answer 1

Anticipate how users will misuse it and prevent it
Reduce errors in code
Well-maintain code
authentication

Question 2

Input validation

Answer 2

Checking data meets certain criteria before it is inputted into code

Question 3

Types of input validation

Answer 3

Range Check
Presence Check
Format Check
Look-up table
Length Check

Question 4

How is authentication defensive design

Answer 4

Confirms the identity of someone before they have access to the computer

Question 5

How would you do authentication

Answer 5

Passwords
Limited amount of tires
Random letters in password

Question 6

How should you maintain code

Answer 6

Comments
Sub-programs
Indentations
Naming conventions

Question 7

Syntax error

Answer 7

An error in the grammatical rules of the code that produces an error result

Question 8

Logic error

Answer 8

When the computer program is able to be run but not give the desired result

Question 9

Iterative testing

Answer 9

The program is tested while it’s being developed, a par of it is tested and problems can be solved

Question 10

Terminal testing

Answer 10

Program is tested at the end of the development process and the whole program is tested

Question 11

Types of data testing

Answer 11

Normal
Boundary
Invalid
Erroneous

Question 12

Normal data

Answer 12

Data that will give a result and what users will normally input

Question 13

Boundary data

Answer 13

Values at the limit of the program

Question 14

Invalid data

Answer 14

Data rejected by the program

Question 15

Erroneous data

Answer 15

Data of the wrong data type