Salam!
There are personal hearings of competitive Examinations 2011. It is mentioned in the PDF of FPSC not an interview. Personal hearing does not mean an interview . There may be documentation problem of a candidate.
There are also some other personal hearings mentioned there which for Associate professors and Director Generals etc.
The interviews are only those who have qualified departmental Tests such as Graduate Trained Teacher, Research Officers etc.

Hope it is answer of your questions.

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k dana khak men mil kar gul-i-gulzar banta hai.