Before going to the interview it is wise to have a basic understanding about the company goals and culture. Simple questions like these can be researched in advance:

1. What does the company produce?
2. What kind of technology is employed?
3. How big is the company (small, medium, or large)?
4. Where is the company located (one or many locations)?
5. Is it a publicly traded company?
6. What is the financial situation (stock price if publicly traded)?
7. Which partners and collaborators exist?
8. What do the most recent press releases describe?

Most of this information can usually be retrieved from the company website. If the area where the company is located has a central industry information center, it may be worthwhile to obtain information locally as well.

For more: Free Application Letters