Relying solely on online resources for UPSC preparation poses disadvantages such as a lack of structured learning and potential misinformation. Online content can sometimes be overwhelming due to the sheer volume of information available. Moreover, aspirants may miss out on the depth of understanding that physical books provide, especially for subjects requiring thorough analysis. Lastly, excessive screen time can lead to fatigue and distractions, making a balanced approach that combines both online and offline resources essential for effective preparation.