Question

What is a class hierarchy? Give an example with super class, sub class hierarchy?

Answer 1

Answer:

Superclasses are classes from which other classes (subclasses) have been derived. For example, TextItem is an immediate subclass of the View class. This means that TextItem is directly below View in the class hierarchy.

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Answer 2

Answer:

An 'object' is composed of fields and methods.  

Explanation: Jo

• The fields, also referred to as 'data members', 'characteristics', 'attributes or properties', 'describe the object's state'. In general, the 'methods describe the actions' associated with a specific object.

• Objects of software also have a state and actions. The state of a software object is stored in 'fields' and the action is displayed via methods. 'Methods' operate on an 'object's' internal state in software development, and 'object-to-object communication' is done through methods.