WHAT IS THE DIFFERENCE BETWEEN NULL POINTER AND UNINITIALIZED POINTER IN C?

Null pointer is a pointer which is pointing to nothing. Null pointer points to empty location in memory. Value of null pointer is 0. We can make a pointer to point to null as below.

int *p =  NULL;
char *p = NULL;

Uninitialized pointers are called as wild pointers in C which points to arbitrary (random) memory location. This wild pointer may lead a program to behave wrongly or to crash.