Object Oriented Interview Questions

Class

A user-defined data structure that groups properties and methods. Class doesn’t occupies memory.

Object
Instance of Class is called object. An object is created in memory using keyword “new”.

Difference between Struct and Class

·       <!--[if !supportLists]--> Struct are Value type and are stored on stack, while Class are Reference type and are stored on heap.<!--[endif]-->

·       <!--[if !supportLists]--> Struct “do not support” inheritance, while class supports inheritance. However struct can implements interface.<!--[endif]-->

·       <!--[if !supportLists]--> Struct should be used when you want to use a small data structure, while Class is better choice for complex data structure.