The STAR (Situation, Task, Action, Result) format is a job interview technique used by interviewers to gather all the relevant information about a specific capability that the job requires. This interview format is to have a higher degree of predictability of future on-the-job performance than the traditional interview. This technique is a behavioral interview technique.
Situation: The interviewer wants you to present a recent challenge and situation in which you found yourself.
Task: What did you have to achieve? The interviewer will be looking to see what you were trying to achieve from the situation.
Action: What did you do? The interviewer will be looking for information on what you did, why you did it and what the alternatives were.
Results: What was the outcome of your actions? What did you achieve through your actions and did you meet your objectives? What did you learn from this experience and have you used this learning since?.
http://careerservices.wayne.edu/beha...erviewinfo.pdf for more details