Interview, or the Personality Test, is the final stage of the Civil Services Examination.

Even though the interview carries only 300 marks with no minimum qualifying marks, it is the deciding factor at many times of your being within the services or out of it and in the least matters in which service you get. However since the interview is so personal and variable it is most desirable to do very well in the written mains. But an Interview can make or break you so take your personality development rather seriously and make sure to attend some mock interviews at leading institutes.

UPSC Interview questions range from questions about your choice of subject to why you want to join the civil services. It is good to answer honestly but at the same time avoid cliches like wanting to do service to the nation etc.

Questions on your hobbies are imperative so prepare well as they expect some in depth knowledge on that. Questions relating to your name, your college or school name are also a big posibility. If someone well-known shares one of these names please also prepare on that. Also learn up about important events on the year or date of your birth.

As you can see, UPSC Interview questions are mainly from what you have filled in your form including your subject but here it is more a test of logic and presentation and awareness rather than pure subject knowledge. In the UPSC interview many questions are situational like what will you do if a Tsunami strikes your district and you are the DM/Collector/SP.

Questions on your choice of service preference also need to be prepared. Current affairs analysis is important too.
So, UPSC interview is by large the test of your wit and traits, mental alertness, leader qualities and similar other traits.