There were 3 rounds of interview.
First was Resume short list - Keep your resume to the point and focus on your skills rather than the education.
Second was face-to-face interview round 1 - It was with the future boss. So focus on solving the problem.
Third round was face-to-face interview round 2 - It was with the director of the electrical engineering. Focus on the global picture of the work and not just your area of expertise.