ITPEC FE Morning April 2021 Question 47

Classes and Instances in OOP — an instance is created based on the definition of a class.

A class is a blueprint that defines attributes and methods. An instance (object) is a concrete entity created from that class at runtime.

• •Class → Instance: one class can produce many instances
• •Instance → Class: each instance belongs to exactly one class

Why not others:
- (a) Reversed — the class defines specifications, not the instance
- (c) An instance is created from one class, not multiple
- (d) Multiple instances can exist for a single class; only the Singleton pattern restricts this

Key rule: Class = blueprint, Instance = object built from that blueprint.

AI-generated — may contain errors