The interview process consisted of four rounds, including an initial online test.

This included two face-to-face technical rounds and one face-to-face managerial round.

I submitted my documents after clearing all rounds, but my profile was put on hold, with the company stating that all positions had gone on hold.

This was a very disappointing experience.

If there was no requirement, why were candidates called for interviews?

Basic Java questions cover almost all topics, along with the basics of SQL.

A basic understanding of OOP, Collections, String, and SQL is enough to clear the interview.