The UPSC Civil Services Aptitude Test (CSAT), also known as General Studies Paper-II, is a qualifying exam in the UPSC Prelims. It assesses a candidate's aptitude in areas like reasoning, analytical ability, and comprehension. The exam consists of 80 multiple-choice questions, worth a total of 200 marks, and has a time duration of 2 hours. To qualify, candidates need to secure at least 33% (66 marks out of 200). 

Here's a more detailed breakdown:

Exam Structure:

• Time Duration: 2 hours.

• Question Type: Objective (Multiple Choice Questions).

• Negative Marking: Yes, one-third of the marks allotted per incorrect answer.

• Qualifying Marks: 33% or 66 marks out of 200.

• Medium: English and Hindi. 

• Total Questions: 80.
• Total Marks: 200.