View All OOPs

Advise for Freshers

Java OOPs are very easy to understand and practice due to avoidance of many confusing concepts of C++.

I feel better if you follow the same order of reading, as is in the following links, to have easy go.

A) General Programs
1. OOPS concepts – introduction
2. Java Naming Conventions – Readability
3. Basic Class Structure, Compilation and Execution
4. Using Local and Instance Variables
5. Using Methods and Method Overloading
6. Three Great Principles – Data Binding, Data Hiding, Encapsulation
7. Using Variables from Methods
8. Using this Keyword
9. Unassigned Local and Instance Variables
10. static Keyword – Philosophy
11. Static Methods, Static Variables
12. Composition – “has-a” Relationship
13. Inheritance
14. Types of Inheritance
15. Java Extends
16. Java Extend Multiple Classes
17. Method Overriding
18. Member Hiding – super Keyword
19. Constructors and Constructor overloading
20. Java Constructor Properties
21. Many Meanings of final Keyword – In and Outs
22. Abstract Classes
23. Interfaces – Partial implementation of Multiple Inheritance
24. Java Extends and Implements
25. Java Reference Variables – Objects – Anonymous objects
26. Access Specifiers & Access Modifiers
27. Rules of Access Specifiers in Method Overriding
28. Access Modifiers – Meanings
29. Java Private variable accessibility (Private access specifier)
30. Dynamic Polymorphism
31. Avoid confusion with static vs non-static

B) Deeper Concepts and Programs – Increases coding skills
1. Abstract class constructor & Interface abstract
2. Extends Implements
3. Play with Implements
4. Why advised Public methods and Private Variables
5. Call by value and Call by reference in Java
6. Java Create Object
7. Instantiate in Java

C) General Concepts – Important for Interviews
1. Aggregation and Composition
2. Extends vs Implements
3. What is Java Constructor?
4. How to use a Java Constructor?
5. How to call a Constructor from another Constructor?
6. Access Specifier vs Access Modifier
7. Is it possible abstract method to be static also?
8. Can we instantiate an abstract class?
9. Can you create instance of Interface?
10. Explain public static void main(String args[])?
11. Can a constructor be static?
12. Can a constructor be private?
13. Can you overload main()
14. Abstract class with main(), is it possible?
15. Why Java does not support Multiple Inheritance?
16. Why Java does not support operator overloading?
17. Why Java does not support Pointers?
18. Interfaces inheritance – extends or implements
19. Why interfaces are required?
20. Class vs Interface
21. Abstract class vs Interface
22. How many types of classes exist in Java?
23. Java Classes and Interfaces
24. What is a class in Java?
25. Classes and Objects in Java