These are some links for the video for the Operating system’s interview questions and answers briefly.

1. First Part: http://www.youtube.com/watch?v=b18X4uOKjHs
2. Second Part: http://www.youtube.com/watch?v=U6hCzCELg14
3. Third Part: http://www.youtube.com/watch?v=ran13iTUYgE