IBM Intern interview questions

There were 5 rounds totally. One online apti, written technical, 2 face to face technical and 1 HR. 2 days interview process. The first 2 rounds were conducted on the first day. Online apti was easy to crack. written technical was moderate. Face to face interviews were completely about operating system concepts(Since the nature of the work was on OS). Some tricky questions but if you are strong in OS concepts then its easy to crack the interview. Some questions were on Data structures and algorithms(I had mentioned it as my Area of Interest) like design an ATM, finding the middle element of the linked list. HR round was kind of based on the projects done in the college and questions regarding location etc as usual.