How allotment of departments done if selected in upsc?

In the UPSC Civil Services Examination, the allotment of departments is done based on the candidate's rank in the final merit list and their preferences for various services and postings. After the interview stage, candidates fill out a service preference form, ranking the services they wish to join. The Department of Personnel and Training (DoPT) then allocates services based on these preferences while considering the candidate's rank and the availability of positions in each department. The entire process aims to match candidates with departments that align with their preferences and the needs of the government.