What are the major elements in an object model?

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- Abstraction, Encapsulation and persistence
- Hierarchy, concurrency and typing
- Abstraction, encapsulation and hierarchy
- Typing

CORRECT ANSWER : Abstraction, encapsulation and hierarchy

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- According to Grady Booch, “Hierarchy is the ranking and ordering of abstraction”.

- Hierarchy classified in two types, 'IS-A' Hierarchy and 'PART-OF' Hierarchy.

- 'IS-A' hierarchy defines the hierarchical relationship in inheritance and 'PART-OF' hierarchy defines the hierarchical relationship in aggregation.

- Hierarchy allows code reusability and it uses the principle of “divide and conquer”.

Prajakta Pandit 09-24-2015 05:00 AM

mm

what is meant by hierarchy

manas 11-4-2014 08:32 AM

what is meant by hierarchy

hierarchy means


karthiga 09-3-2014 08:03 AM

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