AstraZeneca Research Associate I interview questions

After finished on-line application, I got an Email with a link to chose the date that appropriate for a telephone interview. The interview lasted about 30 min. Basically the process was back ground check and going through the on-line application form from the beginning to the end. I gave a range of the salary that's acceptable on the application form, but the interviewer insisted that I give him a bottom line for it.