The phone interview consisted of questions on Object-Oriented Programming (OOP) for C++ and Java.

C++ questions included:

• How do you implement a Java interface in C++?
• What do you do when a constructor fails?
• Why make a destructor virtual?
• How to decouple classes?

Object-Oriented concepts covered were: Polymorphism, Abstraction, Encapsulation, and Inheritance.

Java questions included: Access specifiers in Java.

The on-site interview consisted of four 1:1 interviews with engineers. These interviews involved puzzles, whiteboarding coding exercises, and design pattern questions.

Examples of coding problems included:

• Design a hash table.
• Generate permutations of n characters.
• Recursively reverse a string or a linked list.
• Big O questions.
• Find the kth element in an unsorted array.

11 puzzles questions.