CTS Placement Paper on 10th March 2007

CTS PAPER ON 10th MARCH
Hello, i m lakhan lalla
I cleared the CTS written test, after i was called upon for the interview.... here are the interview questions which were asked to me...
The HR part :-
The only HR question asked from me was,
1) Tell me about ourself ?
After this question i was asked only Technical questions and those questions went for about 30 mins.
The Technical Part:-
1) what is Virtual Memory ?
2)Tell me about Primary Key and Foreign key?
3)Is the key which declared , foreign in one table, primary in the second table?
4)what is Software life cycle i.e. steps involved( only this was the ques which i didn't answered)
5) what is RDBMS?
6)A simple c-prog.