Considered as one of India's toughest exams, the UPSC attracts lakhs of students every year from across the country, with diverse educational backgrounds, aspiring a career in the public services. According to reports, in 2016 alone, more than 9.4 lakh candidates applied for the exam and as many as 4.6 lakh actually appeared for it. In this episode of Heads Up, we find out what makes the UPSC exam one of the toughest exams in the country, how one can crack it and why many young Indians aspire a career in the civil services.