first of all your age should be 21 to 28 years. second u must be done atleast gradauation with 2nd devision. and the last one is medically u fit. lNO serious diseases ike HIV...urine test....xray chest....eye test, ear test, hand nails in proper form...etc
their will be 11 groups for BPS-17 scale....
you choose 600 marks as an optional subjects and 600 marks compulsury. total 1200 marks. their is 50% aggregative marks for passing css and 40% marks in compulsury subjects and 33% in optional subjects.
after passing exams u call for medical test.
then physcological test.....and the last.......interview/ viva voice...5 members pannel
300 marks for viv/voice pass marks 100
then if u select their is 2 year training in lahore....
english (100),essay(100),pakistan affair,current affair, everyday science, islamait...100 marks each
u decide it which subjects u taken in bachelor's or else any like
punjabi, sindhi, persian, urdu, physics, chemistry, law, accounting, jouranlisim, history, statstics, maths, botany, computer science, philosphy, english literature, arabic.....etc
best of luck....................