The aptitude test is pretty doable and you require not much of practise to solve the quantitative questions and logical questions. The technical part is based on basics of Computer Science related to DBMS, OOPS, OS, Big O notation etc. The interview for non IT students was focused on their branch and their projects. They just asked a few puzzles which was pretty easy. The technical interview involved some HR questions as well. I felt that I couldn't come off completely sincere when I was asked why I was applying for a software job even though I had some projects in my domain. I heard that the HR was pretty easy as well without any mind twisting questions.