Through which the Government of Pakistan recruits officers in Grade 17 under the supervision of FPSC. This exam is held once a year and very capable and consistent candidates are selected and included in the bureaucracy. the establishment and our bureaucracy play a vital role in running the government.
The FPSC announces this exam in a newspaper every year. And the forms are filled out around the month of December. After submitting the form nearly about 3 months roll no slip issued to the applicants. And this exam is held around the month of April. There are 4 types of tests.

 1- Written-test
2- Psychological test
3- Physical test medical test
4- Viva / interview
Successful candidates who go through all these stages are given one group (according to marks). 1-District Management Group. 2-Police Services of Pakistan 3-Custom and Excise 4-Postal group- 5-Income tax group 6-Information group. 7-Foreign services of Pakistan 8-Commerce and Trade 9-Military lands and cantonments. 10-Office Management group. 11-Pakistan Audit and Accounts. 12-Railways commercial & transportation) group.
Ability
21-30 years. (Except in some cases) Government Employee, Disabled Candidates Recognized Tribal Tribal Areas, Baloch Tribes, DI Khan and Peshawar Division, Dera Ghazi Khan and Rajanpur District, etc.) Citizens of Pakistan and Azad Jammu and Kashmir are eligible. ۔ In terms of education, at least the graduate second class with a C grade or its equivalent is divided into two parts.
The subject of the exam: 1-Compulsory subjects.
Compulsory :
English - essay & precise
Pakistan affairs.
General knowledge 
Current affairs 
Everyday Science 
2-0ptionoal subjects
There are also 6 optional subjects. All papers are 100 marks. That is, the total marks are 1200. And it is not necessary to get 50% marks for each candidate. There are 44 passing marks in a complimentary subject and 33 passing marks in optional

In Comprehensive General Knowledge, Current Science, and everyday Science, if marks are less than 40 in one subject but higher in other subjects and aggregate is 120B or more, it will be passed.
Optional subjects are your high-scoring subjects. Intelligence should be used in their selection. And steal subjects that are in line with your nature, you are interested in them, you have good knowledge.

In English subjects, however, marks are generally low (as you can see from experience, teachers are stingy in giving marks from graduation to graduation). English subjects are technical anyway. there are different kinds of rules to write better and unique essays in the exams of css Read from time to time.
Don't become a bookworm. Make notes and do the same in the morning and at night before going to bed.
Read the notice again and again - leave it as it is. Watch and listen to talk shows.
Take part in the discussion. And stay up to date. Be aware of the situation. Avoid becoming a scholar. Never let yourself down. The answer to the question that seems easy in papers like MCQs etc. should be written first.
This will also save you time. Remember, optional subjects can give you a founding mark. Answer the interview with confidence and only answer what is asked. If you don't know something, try it and apologize. And you should wear a sober type of dress.