IBM Asociates Software Engineer interview questions

Describe yourself-family background,native place,hobbies Oops concepts -encapsulation ,abstraction Sorting techniques - merge sort theory explanation, difference between merge and bubble sort, Time complexities of sorting techniques . Os questions -about bus structure About IBM. Why IBM?

There were 3 interviews - first one was telephone round, second one was technical round and last one was HR round with the hiring manager. The interview was mainly focussed on fundamental of computer science and problem solving skills.