Your question is ISR and Device Callbacks. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Implement an Interrupt Service Routine (ISR) and callback functions for a specific device.
Asked in the Embedded Systems stage. Focus was on hands-on embedded systems implementation and handling interrupts.