In embedded software on NXP MCUs such as the S32K or i.MX RT family, a critical section protects shared state from being modified concurrently by interrupt handlers.
Explain how to prevent an interrupt from disrupting a critical section of code. Your answer should address:
Focus on low-level programming behavior rather than RTOS theory. The interviewer expects a practical systems explanation, including common MCU patterns such as saving the current interrupt state, disabling interrupts, executing the protected code, and restoring the original state afterward.