ARRISE Software Engineer Internship interview questions

There are Four rounds , first one is OA which have mainly three DSA questions followed by two technical interview and one Hr round. In the first Technical Interview they ask me on Two DSA question and Questions on My Project. I answered all of them and pass all test case. After that I cleared Round 1 and move forward two Second round. I n second round they focus heavily on Java and Debugging, asked question on REST API, Multithreading , Questions related to Project and Scenario based questions. As I don't have much command on Java I am not able to move forward to Hr round.