FAQ : PYQsPYQs are like a window to the priorities of UPSC. They help you understand the broad themes from which UPSC tends to ask questions repetitively and also gives you the most authentic mock test possible. So here are my two cents on dealing with PYQs :
1. Last 10 year's PYQs are an absolute must. For static subjects like history, geography etc., go as far back as possible. I did it from around 1995 for all the subjects using Arihant compilation.
2. There are two broad approaches for practicing PYQs :
a.
Subjectwise - Read a particular subject, say Polity and then attempt all the PYQs of polity. This can only be done after you have completed reading a subject as I don't think topicwise questions are available in the market.
b.
Yearwise - In this case, you have to solve PYQs as a full length test with mix of questions from all the subjects.
Now there is no right or wrong approach in this. You can cover them whichever way you like. For people with their first attempt, subject wise approach is more feasible. In subsequent attempts, you can solve them yearwise.
3. For people who have already solved UPSC CSE prelims questions very many times, you can also cover PYQs of other exams like CDS (not advisable until you have thoroughly and sufficiently covered UPSC CSE)
4. From where to practice? Compilations (for subjectwise), UPSC website (yearwise). Some institutes also offer PYQs as mocks and can also try solving them on various telegram channels for the same purpose.
5. How to utilize PYQs?
a. To find out repetitive themes and prepare short notes on them.
b. To work out your own elimination strategy. Can checkout this playlist for the same. (
https://www.youtube.com/watch?v=IHMQXK8QZSo&list=PLFrAJkEb21Aw-F1VhLk9b1LstQh4zeU_R)
c. If there is any topic that has featured in PYQs but you had not read it in course of your preparation, do a quick Google search. If it's a technical subject/process, watch 2-3 short videos on it (3-5mins Wali, not necessarily by coaching institutes). Else, just readfirst 2 paragraphs on wiki. If it's about a govt programme, go to it's official page and read the 'About Us' section.
Remember, the idea is not to know everything about that topic but just to have a functional knowledge so that you're able to eliminate and arrive at the answer based on your limited awareness on the topic.One last thing,
PYQs are non negotiable part of the preparation. There are no shortcuts to it, you have to sit and solve them on your own. Take all the help you need in this process - from YouTube, coachings, mentors or do it yourself, but
DO IT. Unfailingly.Best wishes!🫶🏻