- DBMS and SQL :https://www.studytonight.com/library/
- DSA and Programming : https://www.programiz.com/
- All in One : https://practice.geeksforgeeks.org/
- Aptitude Preparation : https://www.indiabix.com/
- Company Wise Preparation : https://prepinsta.com/
- Aptitude , Reasoning and Technical Interview : https://www.sawaal.com/
- Aptitude , Reasoning and Interview Experience : https://www.careerride.com/
- Coding Practice : https://codechef.com , https://www.hackerrank.com/ , https://leetcode.com/ Any One Which is Preferable
- Java and Oops : https://www.javatpoint.com/