Important Topics

Important Topics Of Java

Core Java :(*imp)

1.Oops, Concept. *

2.Multi-Threading.

3.Exception Handling.*

4.Collection.*

Advance Java:

1.Jsp.

2.Servlet.

3.Jdbc Connection Setup.

Frameworks:

Spring:

1.Spring Ioc.

2.Spring MVC.

3.Spring & Hibernate Integration file. (spring-servlet.xml)

Hibernate:

1. Hibernate XML file.(config. file).

2.Relationship.

3. Hibernate Annotations.

4. Hibernate  Class And Interface.

Spring Boot:

1.Spring Boot Starter Projects

2.Spring Boot Starter Parent

3.Auto Configuration

Most often questions asked in Java interviews are based on these concepts(in the approximately increasing order of difficulty):

1. Polymorphism
2. Dynamic Binding
3. Abstraction
4. Data hiding
5. Inheritance
6. Method overriding
7. Exception Handling
8. Database connection setup(JDBC/ODBC)
9. Access modifiers
10. Exception cascading
11. Immutability
12. Unit testing and integration testing
13. Wrapper classes
14. Object class
15. Java libraries and packages
16. Java util class
17. Java collections
18. Java generics
19. Microservices
20. Object-Oriented Design
21. Design Patterns(Singleton, Factory, etc)
22. Frameworks(Play framework, Spring boot, Apache Tomcat, Hibernate)
23. Java Reflection