The candidate will be interviewed by a Board who will have before them a record of his/her career. He/she will be asked questions on matters of general interest. The object of the interview is to assess the personal suitability of the candidate for a career in public service by a Board of competent and unbiased observers. The test is intended to judge the mental caliber of a candidate.
In broad terms this is really an assessment of not only his/her intellectual qualities but also social traits and his/her interest in current affairs.