It's one of the easiest questions to ace, if only you do some research before your interview.
Background information including company history, locations, divisions, and a mission statement are available in an "About Us" section on most company websites. Review it ahead of time, then print it out and read it over just before your interview to refresh your memory. Also check the company's LinkedIn page and Facebook page, if they have one.
Do you know where you worked when? You might be surprised to know that some interviewees don't recall their dates of employment and some of the other data on their resume. Here's how to keep your avoid fuzzy resume facts.