Generaly, selection panel comprises of one member of psc, one member of estabilishment and administration, one member of finance department and one member of your concerned department.
They often ask questions of general nature.General questions could be asked regarding ur BE , pakistan affair and general knowldge.
Now a days, they regularly ask a question; if we will send u to a remote area,will u perform ur job?
Best of luck.

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winners never quit, and quitters never win.