Hello,

Generally UPSC tends to be more humanities oriented that is you have to study history, geography, polity, economics etc, and this is prevalent in your prelims as well as mains, however if this question is in anyway related to the optional subjects then Civil, Mechanical and Electrical Engineering are there, hence if you have any interest in any of these fields, you can accordingly choose your career, other than this you have to study a large part of portions that covers humanities subjects,

UPSC Civil Service Exam consists of three stages-

Preliminary: First Stage is MCQs based exam, it has two papers and each one consists of 200 marks,its numbers ain't added to final list, you just need to score the required cut offs against your category.

First is GS Paper-I which consists of the following topic such as History of India and Indian national movement, Indian and World geography, Economic and social development- sustainable development, poverty,inclusion demographics, social sector initiatives etc,Indian polity and governance-constitution,political system,Current Events nationally and Internationally, General Science,General Issues on environmental ecology,biodiversity and climate change. you just need to score the required cut offs against your category.

Second Paper is CSAT which is qualifying by nature,you need to score merely 33% which is 66 marks out of 200, it includes following topics such as basic numeracy, comprehension, logical reasoning and analytical ability, general mental ability, decision making and problem solving, interpersonal skills including communication skills.

Mains: This is a second stage which it's more of a subjective type, you are required to write answers for Four General Studies Paper such as

GS-I includes Indian Heritage and Culture,History and Geography of the World and Society,

GS-II includes Governance, Constitution, Polity, Social Justice and International Relations,

GS-III includes Technology, Economic Development, Bio-Diversity, Environment, Security and Disaster Management,

GS-IV includes Ethics, Integrity, and Aptitude

Two Optionals,

One Essay,

Two Language Paper

In total there are nine papers in Mains, and each paper is of 250 marks, total adds up to 1750 marks.

Interview : The two stages are further followed by personality test of 275 marks.

But, remember that irrespective of the stream you choose you will be eligible to appear for UPSC if you have done graduation in any stream from a recognized university as there are no barriers of belonging to any specific domain as such.