Roadmap for interview preparation for experiened java developer

 For Backend

1. Java EE JDK 7
• OOPS
• Collection
• Threading
• Exception handling
2. Java 8 Features
3. Hibernate
4. Spring Boot
5. Design Pattern (optional)
6. Algorithms  (optional)

For Front-end:

1. HTML
2. CSS
3. Bootstrap
4. JavaScript
5. jQuery
6. Angular 
7. Reactjs

Database:

1. PostgreSQL
• Queries
• Stored procedure
• function
• views
• triggers
2. Oracle
• Queries
• Stored procedure
• function
• views
• triggers