Moreover, there are common interview questions that have quite reasonable weight-age as per my experience for example:
Q: Tell us your weakness
Bad Ans: I lack communication skills etc etc. (Giving them your actual weakness)
Good Ans: I have a bad habit of having a very focused approach. Once assigned a task, I can only sit back when it's accomplished successfully. I cannot think of anything else etc. (Portraying a strength as your weakness)
Q: Where do you see yourself after 5 years from now?
Bad Ans: At your place
Good Ans: A successful team leader with 100% job success rate etc etc
Q: Why you left/want to leave your previous job
Bad Ans: I had a fight with my manager over some issue
Good Ans: I found my previous job is no more challenging for me
Q: Why do you want to join us
Bad Ans: Handsome salary and good incentives
Good Ans: I expect that I'll face new challenges in this job that will help broaden my vision and polish/improve my skills
and the list goes on.