Context

In embedded software on NXP Semiconductors microcontrollers such as the MCUXpresso SDK targets, memory behavior directly affects reliability, latency, and fault diagnosis.

Question

Explain the main differences between stack and heap memory in a microcontroller environment.

Your answer should cover:

1. How memory is allocated and released on the stack versus the heap
2. Typical use cases for each in embedded C/C++ firmware
3. Common failure modes such as stack overflow, fragmentation, and allocation failure
4. Why many embedded teams restrict dynamic allocation in production firmware

Scope Guidance

The interviewer expects a systems-oriented explanation, not just desktop-programming definitions. Discuss memory layout, determinism, performance, and debugging considerations relevant to constrained MCU environments.