ADP Sr. Software Engineer interview questions

I didn't see a separate interview panel for java! I have reached office at 11am, i noticed very few people attended for java interview less than 5. After 2:30pm one guy come and called my name, said sorry "i was in a meeting". He Started questioning by looking at my resume. He is not sure that from where to start the discussion. In the middle of the interview he got a phone call and then he said i understood your explanation you can leave for the day. Mistakes from my side -> I was not brush up my books.