How do we know the sources from where the UPSC asked questions in previous prelims and Mains exams?

Question

I am looking for a practical answer to this UPSC question: How do we know the sources from where the UPSC asked questions in previous prelims and Mains exams?

If someone has prepared seriously for this part of the UPSC process, please share a clear strategy, useful resources, and the mistakes that usually waste time. Honest advice from repeat aspirants would help a lot.

Nikhil Deb · Answer

Preparation changes a lot depending on whether you mean prelims, mains, or CSAT. Treating them the same is one reason many plans feel messy.

That is usually where preparation starts feeling more manageable.

Akash Handa · Answer

The easiest way to think about it is:
- prelims needs accuracy and elimination
- mains needs structure and depth
- CSAT needs timed practice and calm execution
The study style has to match the output.

That small shift alone can save a lot of time.

Muskan Kohli · Answer

Students often keep reading new content when the stage actually demands practice under pressure. That is where marks get lost.

Most people improve once that part becomes clear.

Yash Mohanty · Answer

Once the basics are decent, mock analysis becomes more valuable than endlessly adding fresh material.

Lakshya Pingle · Answer

The revision pattern also changes by stage. Prelims needs compression, mains needs layered understanding.

This is why simpler plans often work better for longer.

Tushar Sathe · Answer

I would treat each stage as a separate skill rather than one big generic preparation block.

How do we know the sources from where the UPSC asked questions in previous prelims and Mains exams?

6 Answers