Section Six - Design, Testing and IDEs

Question 1

What is the purpose of defensive designs?

Answer 1

They help ensure programs function properly (never break or produce errors)

Question 2

What is Input Sanitisation?

Answer 2

Removing any unwanted characters before passing data through the program

Question 3

What is Input Validation?

Answer 3

Checking if data meets certain criteria before passing it through a program

Question 4

What is a Whitelist?

Answer 4

A list of all data a program shouldn’t accept.

Question 5

What can Authentication help?

Answer 5

It can help confirm the identity of a user before they’re allowed to access certain data.

Question 6

What types of Errors can there be in a program?

Answer 6

Syntax Errors

Logic Errors

Question 7

What are common ways to increase security of a password-based authentication system?

Answer 7

Strong passwords and regularly changed passwords
Limit number of failed attempts
Ask for a random selection of characters from password

Question 8

What is a Syntax Error?

Answer 8

When the compiler or interpreter doesn’t understand something you’ve typed because it doesn’t follow the rules or grammar of the programming language.

Question 9

What is a logic error?

Answer 9

When the compiler or interpreter is able to run the program, but the program does something unexpected

Question 10

What is a Performance test?

Answer 10

Tests how quickly certain features run and their impact on computer resources

Question 11

What is a Usability test?

Answer 11

Tests how user-friendly the interface and features are

Question 12

What is a security test?

Answer 12

Tests vulnerability to stacks and how securely data is stored

Question 13

What is a load/stress test?

Answer 13

Tests how it copes under extreme conditions, e.g. lots of users at the same time

Question 14

What is normal data?

Answer 14

Things that a user is likely to input

Question 15

What is extreme (boundary) data?

Answer 15

Values at the limit of what the program should be able to handle

Question 16

What is erroneous data?

Answer 16

Inputs the program should not accept

Question 17

What are examples of high-level languages?

Answer 17

Python, C++, JavaScript

Question 18

What do low-level languages consist of?

Answer 18

Machine code and assembly languages

Question 19

What are the purpose of Translators?

Answer 19

To convert programming languages into machine code

Question 20

What are the three types of translators?

Answer 20

Assemblers, compilers and interpreters

Question 21

What are differences between compilers and interpreters? (Translating the code)

Answer 21

Compilers run all of the source code at the same time and creates an executable file, but interpreters run the source code one instruction at a time and doesn’t create an executable file.

Question 22

What are differences between compilers and interpreters? (When they are needed)

Answer 22

Compilers are needed only once to create a executable file whereas interpreters are needed every time you want to run the program.

Question 23

What are differences between compilers and interpreters? (Errors)

Answer 23

Compilers returns a list of errors for the entire program whereas the interpreters stop at the first error and returns it.

Question 24

What does IDE stand for?

Answer 24

Integrated Development Environment

Question 25

What is an IDE?

Answer 25

A piece of a software that provides features to help a programmer to develop their program

Question 26

What are some common features of an IDE?

Answer 26

Code editor 
Run-time environment 
Explorer window 
Output window 
Error diagnostics 
A translator