[Solved] Consider the following FreeRTOS code snippet:void *ptr = pvPortMalloc(100); if(ptr != NULL) { vPortFree(ptr); ptr = NULL; } printf("%p", ptr);What will be the output of the printf statement? | FreeRTOS

FreeRTOS - Memory Management

Consider the following FreeRTOS code snippet:

void *ptr = pvPortMalloc(100);
if(ptr != NULL) {
    vPortFree(ptr);
    ptr = NULL;
}
printf("%p", ptr);

What will be the output of the printf statement?

AA memory address (non-NULL pointer)

BCompilation error

CNULL (0x0 or equivalent)

DRandom garbage value

Step-by-Step Solution

Solution:

Step 1: Analyze memory allocation and freeing
pvPortMalloc(100) allocates memory and returns a pointer. Then vPortFree(ptr) frees it, and ptr is set to NULL.
Step 2: Understand the printf output
Since ptr is explicitly set to NULL, printf will print 0x0 or equivalent NULL pointer representation.
Final Answer:
NULL (0x0 or equivalent) -> Option C
Quick Check:
Pointer set to NULL after free = NULL output [OK]

Quick Trick: Pointer set to NULL after free prints NULL [OK]

Common Mistakes:

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