I sent my CV and got a phone call that invited me to the interview.

The interviewer was very nice; I talked about myself and my experience.

Please see the interview questions below.

Implement Queue class: constructor, enqueue and dequeue functions.

In addition, implement Semaphore class with constructor, up and down functions, and Mutex class with lock and unlock functions.

Implement a state machine using OO/design patterns.

Print a binary tree by levels.

Knowledge questions