Amdocs SME (Trainee) interview questions

It was a campus interview. First round was Apti+Coding+(Unix,Sql,language) based. I was one of 17 who got selected for next round out of around 150 strength of students. In my technical interview he discussed about my projects and given me a code to write that I did correctly and then he asked about DBMS and foreign key roles and then he ended the interview. After their lunch I was called for HR round and HR told me that I have to wait because they have to decide something and will call me later. After all candidates had given the interview at last I was called for 2nd technical interview and other tech guy asked me about a sql join query, I did that right than he asked me about linux command I said to him that I do not have much knowledge about linux and than he asked me about cloud, I answered him whatever I knew about cloud then he asked me about XML even it wasn't written on my resume, I said to him that I didn't work on XML so I don't know about it but I can learn. And than he ended the interview. Again I was called for HR, she made an apology twice for keeping me on hold for almost 7-8 hours untill all candidates were giving their tech and said to me that you need to brush up the things more.