Hello Ayush Kumar,

Education Qualification: Candidates must be in final year of Bachelor's degree or completed Bachelor's  degree in any discipline from a  recognised College or University.

So if your friend is in final year of graduation then he can take UPSC exam in 2022. But by the time of Certificate verification you must have your Degree Certificates.

Maximum  age  limit is  32 years for General Category candidates. There is 3  year  relaxation on upper age limit for OBC Category candidates and 5 years  for SC/ ST category candidates.

For more information about UPSC eligibility criteria go through below mentioned link.

https://competition.careers360.com/articles/upsc-ias-eligibility-criteria/amp

UPSC CSE is conducted in 3 stages:

Prelims Exam :- Objective Paper

Mains Exam. :- Descriptive /Written exam

Personal Interview : Personality Test

To get more information go through below mentioned link.

https://competition.careers360.com/articles/upsc-ias-exam-pattern

Hope this information was useful to you.

All The Best!!