Indexing - zero-based access; negative indexing from the end — IITM BS previous year questions

Indexing - zero-based access; negative indexing from the end is part of Lists - Introduction, Week 5 in Computational Thinking. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.