IBM Associate Developer I interview questions

Interview at my campus 2 rounds 1)written(series questions) platform was not at all good .. be careful while appearing.. totally concentrate on series problems 2)single interview where your confidence is tested rather than your answers.. I told him many wrong answers confidently....even though got selected. he asked me about AI we had a long debate where I was really confident which made me to impress him. he asked me which one is faster ?? java or c?? I don't know the answer so I just said java and gave some explanation confidently