I was asked to design a database based on the requirements given by the interviewer and had to write some queries too. I was asked an object oriented design problem too. Details about Performance Testing. Explain dynamic, divide & conquer way of programming. Implement fibonacci using iterative, recursive and dynamic programming. Explain merge sort. How it uses divide & conquer programming. Circular linked list implementation based on a problem given. Differences between linked list and array list. Differences between C++, Java and Python. (I didn't revise C++ much, so couldn't answer virtual functions in detail) Difference between Future and Callable. Explain Executor Services.