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Object Oriented Programming In Java(OOPS)

1. Data Hiding 
2. Abstraction
3. Encapsulation
4. Tightly Encapsulated Class
 5. IS-A Relationship(Inheritance)
 o Multiple inheritance
 o Cyclic inheritance
6. HAS-A Relationship
 o Composition
o Aggregation
7. Method Signature
8. Polymorphism
o Overloading
 Automatic promotion in overloading
o Overriding
 Rules for overriding
 Checked Vs Un-checked Exceptions
 Overriding with respect to static methods
 Overriding with respect to Var-arg methods
 Overriding with respect to variables
 Differences between overloading and overriding ?
o Method Hiding
9. Static Control Flow
o Static control flow parent to child relationship
o Static block
10. Instance Control Flow
o Instance control flow in Parent to Child relationship
11. Constructors
o Constructor Vs instance block
 o Rules to write constructors
o Default constructor
o Prototype of default constructor
o super() vs this():
 o Overloaded constructors
o Recursive functions
12. Coupling
13. Cohesion 
14. Object Type Casting
o Compile time checking
o Runtime checking
 Singleton classes
 Factory method 
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