For most companies, the HR interview is the first line of defense. The questions asked are typically used to determine the following:

1) Your motivation for their position or your career path.

2) Your ability to communicate ideas clearly

3) How do you deal with abstract questions/thinking

4) Do you appear to be a team player or loner.

5) etc., etc., etc.

Most HR managers have a good feel for the positions overall requirements as they relate to people skills, communication and overall corporate values. If you keep these ideas in mind, you will be able to respond satisfactorly and get to move on to the next round.

Good luck!