The interview process begins with a telephone interview, covering both technical and HR questions.

This is followed by a face-to-face interview, initially with the hiring manager alone, focusing on HR-oriented questions and a written test on C programming.

After passing the test, you'll be interviewed by a panel of usually three people on technical matters only.

If this stage is passed, you'll finally have a short interview with the most senior management, who will then offer you the position.

C programming tests are easy, but they are fundamental to show not only programming skill but also one's thought process.