Saint-Gobain interview questions

I had appeared for interview at campus conducted by icai in pune. Firstly there was shortlisting as per qualification. Then there was a gd round where we were given a very current topic. It was followed by 2 PI rounds. 1st was technical, 2nd was HR. technical was easy and simple. Hr was a bit a tricky.

a recruitment agent called me and asked whether I'm looking for a position, and so I confirmed. Arranged the interview for the next 2 days (so quick), which sounded promising. (the job description was a perfect fit according to my experience and expertise) I did not get the offer eventually, and once I asked the agent to provide me the basis of the decision, guess what? The agent was told that I looked too professional for the position and how they consider me to be over qualified. (that's a nice offense)