Phone interview consisted questions on OO for C++, Java. C++ questions: How do implement java interface in C++? What do you do when constructor fails? Why make a destructor virtual? How to decouple classes. Object Oriented concepts: Polymorphism, Abstraction, Encapsulation, Inheritance. Java: Access specifiers in Java. On site interview consisted of 4 1:1 interviews with engineers. Consisted of puzzles, white board coding, design pattern questions. Examples: Design a hash table. Generate permutation of n characters. Recursively reverse string or linked list. Big O questions. Find the kth element in an unsorted array.