What happens in the system if the Heap memory area is completely exhausted?

If the Heap memory in an Android application is completely exhausted, the system cannot allocate additional memory for objects. As a result, an OutOfMemoryError (OOM) occurs.

This means that the application is trying to create or load objects, but there is no free memory in the heap. In such cases:

• The application may crash.
• The system may attempt to free memory through garbage collection, but if this does not help — OOM is inevitable.

To avoid exhausting the Heap, it is important to optimize memory usage, for example, by freeing unused objects, using weak references, avoiding memory leaks, etc.