HTTPS client to OpenAI/Azure OpenAI, send messages array, handle retries/timeouts, meter tokens. Keys in secrets, not code. ShopNest OrderAssistant service wraps the API.
CGI rounds often probe: Government/enterprise delivery.
Themes commonly reported in public MNC interview experiences (AmbitionBox / LinkedIn / Glassdoor-style). Practice aloud; keep answers this short in the real round.