Here are some bad questions (often asked by otherwise good candidates):
- What exactly does this company/office/group do? [you should know this and so this really reflects badly]
- How well did I do? [no way... you didn't just ask this... I don't believe it... ugh... most likely this means you did badly - if not you just lost several points]
- How can I do better in the next interview? [are you serious? never ask this]
- Anything about money [unless maybe you're talking to an HR person, which if I'm interviewing you, you're not]
- I can't think of anything [nothing? nothing at all? really? you know you might have this job for the next 5-10 years; it could be thousands of hours of your life; it might keep you up at night from time to time; it might be the job you've always wanted; it might be the best decision of your life; it might be the worst decision of your life; are you sure there's nothing you want to know? really?!?!]
Interviewees' questions don't make or break the interview - their answers do. Still, interviewers (especially if they're developers/engineers/etc.) like to know that their potential coworker has interesting things to say and shows some interest in what's going on. Think about it - this is probably what we want to do and we're here doing it. At least pretend you're interested.
But of course if you're just pretending... we'll know.