A candlelight vigil was held by the students who alleged that the results were not fair and blamed the commission of corruption.
The students also displayed placards and banners and shouted slogans against the UPSC.
"Many students with lower scores have made it to the list, while those with higher marks have been left out," said Anurag Tripathi, a PhD scholar from the Jawaharlal Nehru University in Delhi.
"I scored 84 in Geography and 56 in General Studies but my name was not in the list, but I know students with lesser marks who have made it to the list," said Kapil, another student from JNU.
The UPSC preliminary exams results were declared last week. The UPSC conducts a three-tier exam yearly for entry into country's higher administrative services.
Disclosure of marks and the cut-off has been demanded by students in the past as well. The commission has also rejected Right To Information applications demanding the disclosure of marks.