Utilizing flashcards enhances knowledge retention for UPSC exams by promoting active recall. Candidates can create flashcards summarizing important concepts, definitions, and keywords, allowing for quick revision. Regular review of flashcards reinforces information in short bursts, making it easier to remember details over time. This technique is particularly effective for subjects requiring memorization, such as Polity and Geography. Additionally, integrating visuals or mnemonics on flashcards can improve memory retention further, transforming study sessions into engaging learning experiences.