Question-Answer Round Techniques :
Interviewing questions should be necessarily job related. Any other question that is not relevant may cause discomfort to the candidate. Questions related to the candidate's religion, marital status, race, nationality, sexuality, illness etc. should not be discussed. Such questions are termed as illegal questions and candidates have every right to file a case against the company.
As an interviewer, your job is to elicit as much information as possible about the candidate during this session. While some candidates will freely answer the questions, there may be some who take time to open up. Allow the candidates a moment's time before they speak. If they have a problem in comprehending your questions, try to rephrase them in a different manner.
Similarly, listen to each candidate carefully. It is necessary to minutely evaluate what he has to say. However, make sure you have some control over the interview. Certain candidates have has the tendency to over-explain or repeat themselves. In such cases, expertly bring them back on the right track.
Introduce a lot of open-ended questions in the interview. Such questions help to understand the candidates' ideas and perspective. Asking behavioral questions are the best options, as they pinpoint candidates' behavior in particular situations.
Finally, do not demean any candidate's achievements, qualifications or preferences. Making a candidate feel uncomfortable or looking down upon him is not recommended, under any circumstances.
Things to look out for during the interview :
There are a lot of other non-verbal signs that you can keep a look out for during the interview that will help you to evaluate a candidate's performance better.
A basic study of body language enables the interviewer to decipher a lot about the candidate sitting across. Low eye contact, constantly fidgeting with pen/ hands, shaking legs etc. are signs of poor confidence and anxiety. Similarly, crossed arms and legs are known to be signs of aggression and close-minded ness.
What a candidate says is important; but how he says it, is even more important. Pay attention to his speech and its intonations. Was it a question/ answer or a statement - an interviewer must be able to tell.
Ideally, companies should adopt these interviewing techniques to successfully rope in an employee that suits the position.