3.4.1.10 Composition.

Question 1

Define composition.

Answer 1

Design technique to implement a has-a relationship. Composition is achieved by using an instance variable that refers to other objects.

Question 2

Define Composition Aggregation.

Answer 2

Creating an object that contains other objects and will cease to exist if the containing object is destroyed.

Question 3

Define Association Aggregation.

Answer 3

Creating an object that contains other objects, which can continue to exist even if the containing object is destroyed.

Question 4

Specification knowledge.

Answer 4

Know how to build a composition abstraction by combining procedures to form compound procedures.

Know how to build data abstractions by combining data objects to form compound data, for example tree data structure.