1.9

Question 1

What is defensive design?

Answer 1

Defensive design is an approach to software development where every possible input from a user is considered to anticipate all of the ways a user could misuse a program.

Question 2

Define robust (programming)

Answer 2

Robust is ensuring that the final program is reliable for all users.

Question 3

What are the 5 main categories of input validation?

Answer 3

The 5 main categories of input validation are:

length check

type check

range check

presence check

format check.

Question 4

State the meaning of isdigit()

Answer 4

The isdigit() method checks if a string contains only digits. It returns True if all characters are digits, False otherwise.

Question 5

What is program maintainability?

Answer 5

Program maintainability is used to ensure programmers can easily understand what a program is doing months or years after having first written it.

Question 6

Define debugging

Answer 6

Debugging is the process of finding and resolving errors or defects within a program.

Question 7

What features promote maintainability?

Answer 7

The features that promote maintainability are:

comments

meaningful variable names

white space

indentation.

Question 8

Iterative testing

Answer 8

Iterative testing is a type of testing where each part of the program is tested during the development of the program.

Question 9

Final testing

Answer 9

Final testing is a type of testing done at the end of development.