Instructions

1. Answer concisely, then justify with a real circuit or firmware example.
2. State assumptions when a device family is not specified.
3. Safety limits and failure handling form part of every technical answer.

Skills assessed

• Embedded C/C++
• GPIO and electrical safety
• Serial protocols
• Real-time design
• Debugging and production reliability

Permitted resources

• No internet search
• Board datasheets may be supplied
• Personal handwritten notes