Behavioral interview usually focuses on a number of individual 'behaviors' or 'competencies' that the company has identified as being particularly important for the job. These competencies would include teamwork, creativity, persistence, communications et al.
In a behavioral interview, the interviewer asks the candidate to describe situations that he/she has actually experienced. For example, if they want to know whether you are a team player or not, they might ask you about your best team experience and why you consider it the best. If you have strong teamwork capabilities or tendencies they will come to the fore when you describe your best team. A candidate who prefers to work alone will find it difficult to think about and describe an effective team experience.
As a candidate, you should be equipped to answer the questions thoroughly. You can prepare better for this type of interview if you know which skills that the employer has predetermined to be necessary for the job you seek. In the interview, your response needs to be specific and detailed. Candidates who tell the interviewer about particular situations that relate to each question will be far more effective and successful than those who respond in general terms.
Here is a list of probable behavioral interview questions that you may face.