Totally agree with Jeremy's comments, and that's not just for those new to the work force. Even after 21 years working I still prep for an interview and learn as much as possible. Check the company out in YouTube and see if they have a "Life at" video showing their employee history. Check our Yahoo financials, or if you have a friend working there already, reach out to them and see what they truly think about the company. A lot of firms have a referral program so if they are not referring you for the position then maybe they are not 100% behind the firm.
Look at models like the 30/60/90 that look at what you would do within the first 30/60/90 days in the job. Write down the pros and cons as you find them, and be yourself. These people could potentially be your employers for the rest of your career so be honest from the start.