Answered by Rachael, Hiring Expert at Merck & Co., Inc., on Thursday, May 11, 2017
It is difficult to put number on how many questions you may be asked in an interview, as each company and interviewer may have different set of questions and interview styles. To ensure a successful interview, being prepared is the best thing you can do. I would reccommend driving to the interview site in advance to determine how long it will actually take and get familiar with the parking lot area. Being 15 minutes early is considered "on time", as you may need to fill out an employment application or other documents when you arrive. You should be prepared to talk about everything on your resume, including some stories about your work experience that isn't on your resume. You would certainly stand out among the other candidates if you conducted research on the company, but also on their competitors. Try to find information about the company that isn't readily available on their website. Bring questions pertaining to the job, but stay away from questions that involve compensation and benefits. The interviewer may ask you questions outside of the normal behavioral type, such as "If you were a color, what color would you be?" or "If you could meet someone from the past, who would it be and why?", just to learn more about how you think on the spot and get a better understanding of your interests and personality. With regard to behavioral questions, they will ask you to describe a situation from your past, what you were tasked with, how did you take action, and what was the result. You should try to apply this "STAR" (Situation, Task, Action, Result) to any question they ask you, so you can answer it effectively and completely. The key take away for the interviewer is to see how you performed in the past, as it is an predictor of how you will respond in the future. I hope this is helpful. Good luck on your future interviews!