Not only I did not know the answer, the question never occurred to earlier.
I was also asked “The Internet”. Told them “Don’t know much. All I know is it is a computer network”. I really didn’t know what a computer network was those days. I simply picked up that line some where
I topped the interview, however. But didn’t join.
Sorry for going off track.
Other two questions:
1)formula to calculate area of triangle
2)structure of atom