Challenges of online learning for UPSC aspirants include distractions, lack of engagement, and limited interaction with peers and mentors. The absence of face-to-face communication may hinder collaborative learning, making it harder to gauge understanding through discussions. Furthermore, navigating vast online resources can sometimes lead to information overload, complicating focused study efforts. Technical issues may also disrupt sessions and create frustration. Additionally, self-discipline is crucial in an online setup, as the flexible nature might tempt candidates to procrastinate. To overcome these challenges, aspirants should utilize structured schedules and seek active participation in online forums to enhance their learning experience.