Representing ∞ (no edge) vs 0 (zero-weight edge) — IITM BS previous year questions

Representing ∞ (no edge) vs 0 (zero-weight edge) is part of Edge Labelled Graphs, Week 8 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.