Programming Paradigm

Question 1

What is an object

Answer 1

a container used to store both data and instruction , it is created from classes using instantiation

Question 2

WHat is a class

Answer 2

specify what properties and methods objects of their type would have

Question 3

WHat is a private method

Answer 3

Can only be accessed within the class it was declared and nowhere else

Question 4

WHat is a public method

Answer 4

a function or procedure within a class that’s accessible and callable from any other part of the program, inside or outside its clas

Question 5

WHat is encapsulation

Answer 5

grouping of attributes and methods are stored in the objects /
combining methods and procedures to form an object

Question 6

WHat is inheritance

Answer 6

allows one class to share the properties and methods of another class . It “is a “ relationship

Question 7

What is polymorphism

Answer 7

WHen objects are processed differently depending on their class

Question 8

WHat is overriding

Answer 8

Sane name as a method in an inherited class but different implementation

Question 9

What is association

Answer 9

descibed as having a “has a “ relationship

Question 10

WHat is aggregation

Answer 10

weaker type of association , it would exists if its containing object is destroyed

Question 11

What is composition

Answer 11

The containing object is destroyed , the association object is also destroyed ( stronger relationship)

Question 12

Why is oop used

Answer 12

it provides program with clear structure
makes developing and testing easier for developers
Allows large projects to be divided among teams of developers
it improves the space efficency of code

Question 13

List the three design principles used in oop

Answer 13

Encapsulate what varies
Favour composition over inheritance
Program to interface , not implementation

Question 14

Explain more on encapsulate what vaaries

Answer 14

Any requirement which are likely to change in the future would be encapsulated in a class , this way future changes can be easily made when required

Question 15

Explain more on favour composition over inheritance

Answer 15

composition has a more flexible relationship by unrelated classes

Question 16

Explain more on program to interface not inheritance

Answer 16

allow unrelated classes to make use of similar methods