There are a variety of questions that should be asked in any successful interview. You will find but a few examples below.
What are you truly passionate about?
Where do you want to be in five years?
What do you think your duties and challenges will be in this position?
What can you contribute to our company culture?
These are all great questions to ask. It's important that your questions be open-ended, such that prospective employees don't just answer with a 'yes' or a 'no' response. You want to get a sense of who they are and what their goals are, and in order for that to happen, you have to get them talking.
Preparation is of utmost importance with any interview. Be ready with general questions, and remember to review each candidate's resume. This will allow you to prepare relevant questions.
With that in mind, there is one question that should be prioritised above all others. That all-important question is…
Why Do You Want To Work Here?
When you get a response for this question, it should become apparent as to whether or not the candidate actually took the time to research your company and the position they are applying for. They will have an informed perspective on what your company does if they have done their part in researching your business.
A serious applicant will be anticipating this question, and will have a good answer prepared. They will have done their homework, and they will be able to give a relevant, on-point answer. They will offer a realistic perspective based on their research and experience.
Conversely, a candidate that is only interested in working or finding a job will probably not have a pertinent answer, because they are likely just looking for job openings. For them, any job would do. This should make it easier to eliminate certain applicants. They will have shown that they do not care about details.
The "Why do you want to work here?" question also puts a healthy pressure on the candidate to demonstrate their hypothetical value to you. It should become obvious as to whether they are detail-oriented and goal-driven or not. They should demonstrate some understanding of company culture as well, because that is an undercurrent to this question.
Moreover, a good candidate will remain humble about their skills, qualifications and fit with your company. They will make convincing points about their value, but they won't brag about what they are capable of. They won't try to inflate or exaggerate their skills and abilities.
Through this line of questioning, an applicant's motivations should also become clearer. You'll have a better idea of what is important to them, and what goals they have. These items definitely play a part in that important but hard-to-define quality called fit.
Anyone that you are taking through the interview process should be there because their resume was of high-quality, and they passed your telephone screening procedures. In other words, you will have found valuable qualities in them already. Make sure to take quality people through the interviewing process.