Any time that you are looking for a job, you are required to go through an interview process. Some companies run you through the grinder while others only have you come for one or two interviews. No matter which interview process you are being subjected to at the time, there are always those pointed and direct questions that you would like to ask but that you know are forbidden.
1. Asking Whether You'll Work On a Team
Many people talk about how great it is to be a "team player." It is good to be able to cooperate with others. However, you don't want to give anyone the impression that you rely on others because of shortcomings of your own. It is best not to ask if you'll be working on a team since it could give the interviewer the impression that you'd be sunk if not for smarter people to rescue you.
If the subject of teamwork comes up, see if you can work into the conversation examples of cases when people you've worked on teams with have come to you to get things done and have seen you as a key resource. If teamwork is important to the employer, you want them to get the impression you would be a driving force on the team, not just someone going along for the ride.
2. Race or Gender
While this may seem obvious to everyone, it still warrants mention because it is very easy present yourself in a negative manner by the type of question you ask. Questions about the race or gender of your boss or coworkers are inappropriate.
Even if you are a woman or minority, you should stay away from questions about diversity. Asking about the diversity of your prospective department or the company as a whole might indicate to the interviewer that you are uncomfortable working with people from different backgrounds or a different gender.
Overall, the interview process can be a harrying experience. One of the best things you can do to make it an easier process is the go ahead and create a list of questions you want to ask and run them by a friend or your spouse and get their thoughts before asking a question that might cost you a job.