Simple. I was asked to come on Saturday.

I don't know what happened. I got the wrong person to interview me, as the things which he told me were false. He told me that interfaces don't support multiple inheritance and gave me an example for that. I told it wouldn't compile, and the interview was over.

After coming back, I tried the same example which he gave about interfaces, and in fact, it didn't compile. So now I am thankful that I didn't get selected.