When trying to choose who to hire, the questions you ask during the interview will intensely affect the quality of material you will learn about your applicants.
PICK A SET OF STANDARD QUESTIONS.
Have a set of standard questions that you ask everybody. These questions should be the basic framework for the interview. This is important for a number of reasons. You can navigate perfecttiming.com to get various job vacancies.
First, it helps you disregard any built-in personal bias you may have. If you ask everyone the same basic questions, everybody will get the same chance to prove that they are the best individual for the job. Some candidates may surprise you!
Second, inquiring a standard set of questions will give you a reference for comparing the applicants to each other. Who best answered each of the questions? Who most often expressed views that are in line with your company culture? If you ask every applicant different questions, you will not have any common points of comparison.
Lastly, it takes some applicants a while to warm up. If you do not have a complete set of questions to ask, you may be tempted to end the meeting before the applicant can put their best foot forward.
However, this does not mean that you have to ask every candidate ONLY these standard questions.
Certainly, you can and should ask lots of individualized follow-up questions about their responses to your standard questions. Also, it is definitely appropriate to ask questions specific to a particular candidate's situation – related work experience, interesting questions, or other pertinent information.