The written test had two sections- UNIX and SQL. Some of the questions were little tricky in unix. There were 15 questions. SQL was mixture of average and few difficult questions. There were 10 questions. Second round:. UNIX- search file,word,sort, count of words in line,file, move to a particular line, delete any line, delete multiple lines, about projects I worked on. SQL: lot of join questions. He showed three tables and asked questions on tables which were done using joins. Third round was technical again UNIX and SQL. It started with 4 situational questions like if there is less time and testing is to be completed on time etc etc. UNIX was asked again. SQL: lot of joins, union, intersect, vi editor, agile versus vmodel,past project experience. Both the interviewers were very polite and they even gave hints when I was little stuck and quite close to answers. The results are still not out so, I dont know if I am selected :)