What is oops? pillar of oops. Details explanation with proper example. Collection framework questions . Difference between collection and collections. Why collection used when there is array is available in java. Difference between array list and linked list why they are used etc.

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Object-oriented programming (OOP) is a programming paradigm based on the concept of objects.

OOP is based on the four pillars: encapsulation, inheritance, abstraction, and polymorphism.
Encapsulation is the practice of hiding data and methods within a class.
Inheritance allows a class to inherit properties and methods from a parent class.
Abstraction is the process of hiding implementation details while showing only the necessary information to the user.
Polymorphism allows objects to take on multiple forms.
Collection framework is a set of classes and interfaces that provide a way to store and manipulate groups of objects.
Collection is an interface while Collections is a class.
Collections provides utility methods for working with collections.
Arrays have a fixed size while collections can grow dynamically.
ArrayList is implemented using an array while LinkedList is implemented using a doubly linked list.
ArrayList is faster for accessing elements while LinkedList is faster for adding or removing elements.

What is oops? pillar of oops. Details explanation with proper example. Collection framework questions . Difference between collection and collections. Why collection used when there is array is available in java. Difference between array list and linked list why they are used etc.

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