IoT Security Interview Questions

An employee wants to connect their smart speaker to the office network. What concerns would you raise?

A car manufacturer hires you to conduct their first automotive penetration test. Before any technical work begins, walk through how you'd map the vehicle's attack surface to scope the engagement, and which entry point you'd prioritize first.

A factory floor is deploying hundreds of sensors for predictive maintenance. The sensors need to report temperature and vibration data every 5 seconds. They're battery-powered, have minimal processing capability, and must last 3 years on a single battery. Engineering is debating between MQTT, CoAP, and a proprietary protocol. Security wasn't invited to the meeting. What protocol considerations would you raise, and how would you ensure security without blocking the project?