Module 9

Question 1

The practice of using existing code to develop new applications.

It is a fundamental principle of software engineering that allows developers to save time and effort by leveraging existing code libraries, frameworks, and modules.

Answer 1

Code reuse

Question 2

A mechanism that allows a class to inherit properties and methods from another class.

Answer 2

Inheritance

Question 3

A mechanism that allows a class to contain instances of other classes as members.

Answer 3

Composition

Question 4

A mechanism that allows a class to delegate responsibility for a task to another class. In this approach, a class delegates the implementation of a method to another object that is responsible for providing the implementation. This enables the class to reuse the functionality of the delegate object without having to implement it itself.

Answer 4

Delegation

Question 5

A mechanism that allows a class to keep responsibility for a task to another class.

Answer 5

Delegation

Question 6

A term used to describe the relationship between two classes, where one class is a specialized version of the other.

Answer 6

“is-a” relationship/Inheritance

Question 7

A type of relationship between classes, which is used to define the ownership of one object by another object.

Answer 7

Has-A-Relation

Question 8

A strong form of the Has-A-Relation, where one class owns the other class and is responsible for its lifetime.
If the owner class is destroyed, then the owned class is also destroyed.
Represents a “whole-part” or “containment” relationship between two classes, where one class is composed of one or more objects of another class.

Answer 8

Composition

Question 9

is a type of relationship between classes, which is used to define the ownership of one object by another object.

This relationship is also known as composition or aggregation.

Answer 9

Has-A-Relation

Question 10

A type of relationship between two classes where one class, the aggregate class, has a reference to the other class, the part class.

Answer 10

Aggregation

Question 11

A mechanism that allows a class to delegate responsibility for a task to another class.

Answer 11

Delegation