200 OK, 201 Created, 400 bad input, 401 auth missing, 403 forbidden, 404 not found, 500 server error. ShopNest POST /orders → 201 with Location header.
EY rounds often probe: Client scenarios.
Themes commonly reported in public MNC interview experiences (AmbitionBox / LinkedIn / Glassdoor-style). Practice aloud; keep answers this short in the real round.