CSC: Online test series are worthy when it comes to UPSC prelims. Mock test should be practiced by all before every exam. Mock test when practiced in exam like setting, are really helpful in removing the fear of exams. But, not all can attend coaching institute's mock test. And that’s when you can use online test series.

Many websites and coaching institutes do offer prelims test series which helps aspirants understand their weak areas in each topic and sub-topic. In fact many of the online test series are cheaper than offline test series.

The test series depends not only on the questions - but the answers given along, and most importantly, the evaluation, along with discussion. So, keep in mind all these points before going for any test series and choose accordingly.