Paper 1

Question 1

What is the difference between a variable and a constant?

Answer 1

Variable - The value of the data item can change during the program’s execution

Constant - The value of the data item cannot change during the program’s execution

Question 2

What are the characteristics of procedural programming paradigms?

Answer 2

A program that consists of step by step instructions

Question 3

What are the characteristics of object orientated programming paradigms?

Answer 3

A program that consists of objects within classes and each object has its own data

Question 4

What is a programming paradigm?

Answer 4

It refers to different styles of programming

Eg OOP, Procedural

Question 5

Why is it good practice to have local variables?

Answer 5

• Decreases the complexity of the code

- Reduces the chance of accidently changing the variable value later in the code

Question 6

What are the advantages of the structured approach?

Answer 6

-Easier to debug
-Easier to maintain
-Allows teams to work simultaneously
-Saves time
Reduces bugs

Question 7

What is the structured approach to program design and construction?

Answer 7

The process of taking a big problem and breaking it down into smaller problems

Question 8

Why is object oriented paradigms used?

Answer 8

Used to structure a software program into simple, reusable pieces of code blueprints (usually called classes), which are used to create individual instances of objects

Question 9

What is a class?

Answer 9

A class defines methods and attribute fields that capture the common behaviours and characteristics of objects

Question 10

What is an object?

Answer 10

Objects based on a class are created using a constructor, implicit or explicit, and a reference to the object assigned to a reference variable of the class type

Question 11

What is mod and the C# equivalent?

Answer 11

Mod is the remainder from division

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