If you're preparing for the PSI (Police Sub-Inspector) exam, solving previous year question papers can really boost your preparation. They help you understand the actual exam pattern, types of questions, and time management. It’s like getting a sneak peek into what the examiners expect. You’ll notice which topics are repeated often, so you can focus more on those areas. Try solving papers in exam-like conditions to build confidence. It also helps in identifying your weak spots so you can improve. Just remember to check for any updates in the syllabus too. Practicing old papers is a smart and effective way to study, not just hard.