63. Pointer-i

Question.2

A developer writes to a configuration value via a pointer:

int *config_ptr;
*config_ptr = 0x0F;

What happens when this code executes?

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Sets the value 0x0F at the memory location config_ptr points to
Undefined behavior — config_ptr was never assigned an address, so it points to an indeterminate location
Compilation error — pointers must be initialized at declaration
Stores 0x0F at address 0x00 (NULL)