An abstraction concept for building a composite object from their component object is?a.associationb.specializationc.aggregationd.generalization

Break Down the Problem

1. We need to identify the abstraction concept related to building composite objects from their component objects.
2. The options given are:
   • a. Association
   • b. Specialization
   • c. Aggregation
   • d. Generalization

Relevant Concepts

3. In object-oriented design:
   • Association refers to a relationship between objects.
   • Specialization involves creating a new class from an existing class.
   • Aggregation is a specific type of association that represents a "whole-part" relationship.
   • Generalization is the process of extracting shared characteristics from two or more classes.

Analysis and Detail

4. The key concept that represents the idea of building a composite object from its component objects is aggregation. This is because aggregation indicates a relationship where one object (the whole) is composed of one or more objects (the parts).

Verify and Summarize

5. Given the definitions of each option, aggregation is the correct choice as it specifically denotes a composite relationship, while the other options are related to different types of relationships in object-oriented design.

Final Answer

The correct answer is c. aggregation.