Oracle Software Developer interview questions

First round was online technical and aptitude test. Tech. was tough. Aptitude was easy. Shortlisted students went through first interview round. Mostly OS and DSA related questions. It was around 40 min. After first interview we had final Tech. interview. I was shortlisted for second round. This was quite a long. Mine went for 1:30. They ( 2 interviewers) asked me almost everything related OS, DSA, C programming and Shell. You can only crack this interview if you are strong in all domains. I did not clear this round. After that they had HR round which was not that much important if you have done well in Tech. rounds. I guess it was just formality type thing.