The interviewer was very calm and friendly. They also explained or elaborated on questions that I did not understand.

The questions asked were from a basic level, generally covering:

• OOPS Concepts
• 1-2 Coding Questions (difficulty level: easy)
• Implementation of Data Structures (Stack, Queue, etc.)

1. Give a brief description about yourself.
2. Asked about my family background.
3. Some questions on OOPS concepts.
4. Coding problems:
   • Write a program to reverse a string.
   • Write a program to swap two variables (with/without using a temporary variable).
5. Write a program to implement a "Queue" data structure.
6. Some 2-3 reasoning-based questions:
   • If you're provided with a transparent, cylindrical glass, filled to the top (it's full), and you're provided with nothing, how can you empty the cylindrical glass exactly half?
   • You're provided with spherical balls of 10 different colors, having the same shape and size (all are identical). The weight of all colored balls are the same, except for one colored ball. Suppose you know the actual mass and the mass of the defective ball. You're provided with a weighing scale. How to find the ball with the defective mass, given that you can weigh it only once? Note: You can take as many balls as required of any color.