Skillnet Solutions Entry Level Java Developer interview questions

I have applied there around Dec 2019 Thought my institute after that within 2-3 days interview was scheduled. First Round was written test: It had few MCQ's and two programing question and those are easy. Second round: It was a technical round all question are Core java based questions interview. The main focus is on OOP concepts. Anyone need to be very good with oop to clear this round. I was not able to qualify this round.