I was a rehire (I had worked for the Accenture CIO previously) so it was a slam dunk for me. They asked me a series of questions about my education and work background. I had mainframe experience and the project they were staffing used mainframe extensively. The usual behavorial questions such as 'how have you dealt with people the were hard to work with', 'have you ever been asked to do something unethical', 'how did you deal with a mistake you made'. Be sure to give the usual PC corporate answers.