Thanks for A2A. Online test series perhaps are a boon for candidates who cannot relocate to Delhi (or other Mecca of Civil Services Preparation). I had joined Vision IAS online test series for GS and Sociology and Elite IAS for Sociology. And based on my experience I would highly rmend them. With reference to how online test series work here a step-wise ge After you enroll for a designated test series you are given login details to access your student account. The student can either download the test paper or view it in the portal while answering question. I would rmend downloading the question paper given that any disruption in internet connectivity can be a distraction or be a drag on time. Once the answer writing isplete student must scan the answer sheets and upload them in PDF format using the ear-marked drop-down box. This is a slightly time consuming part. By scan I mean a fair quality picture clicked by camera phones. The s Wrong arrangement of answer sheets (which are generally loose paper sheets) Not writing test at one go. Hope this helps. Happy Test-ing!