Online Assessment

A 90-Minute OOD/State-Machine OA on CPU Core Cooling

OptiverSoftware Engineer · Intern · Online Assessment · Jul 2026

I recently finished this company's Summer SDE Intern OA, so I'm writing this post to give back to the community. There were two parts in total. One part was a HackerRank OA (90 minutes), an OOD / state machine simulation problem — a puzzle game kind of like Tower of Hanoi. Problem overview Implement an OverheatPreventionController class to simulate and manage the temperature and cooling state of…

Shared by a candidate · reported Jul 2026. Interview formats change; use it as a guide, not a script.