I had interview today the panel is very friendly, always smiling, very helpful. Questions oddly gets repeated so don't bother about others interview. Interview is highly subjective depending upon your profile-degree, habits, hometown etc. So be yourself and confident.
The following topics are important and you must know them.
# Economy-GDP, GNP, Public debt etc.
# FBR Goal.
# Status of FATA, GB, AJK.
# Everything related to Tehsildar job description- Role of patwaris, qanungo etc.

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What you seek is seeking you -Rumi