IBM Internship Interview Experience

IBM visited our campus for internships.

Round 1(Online Test): The test contained some logical questions and games. 

Round 2(Technical Round):

1. Tell me about yourself.
2. What is polymorphism?
3. What is the difference between foreign key and primary key?
4. How to remove duplicates from the linked list (I was asked to implement it).
5. Given a row of continuous zeros and then ones find the index at which the first one appears.

Round 3(HR round): 

1. Tell me about yourself.
2. Some general questions like what are your hobbies etc.

After a week HR called me and informed me that I was selected :) 

Note: IBM converts interns into full-time employees, but it mostly depends on the team in which you are working, and its requirements.