C Programming - MCQ Practice Questions

What is the output? int a = 5; int *p = &a; int q = &p; printf("%d", q);

What happens when you increment a pointer? int arr[5] = {1,2,3,4,5}; int *p = arr; p++;

What is the output? int x = 10, y = 20; int *p = &x; int *q = &y; p = q; printf("%d", *p);

What will be printed? int arr[] = {1, 2, 3}; int *p = arr; printf("%d", *(p+2));

What is a wild pointer?

What is the output? int *p = NULL; if(p) printf("Not NULL"); else printf("NULL");

Which of the following correctly allocates memory for 10 integers?

What is a dangling pointer?

What will be the output? int arr[] = {10, 20, 30}; int *p = arr; printf("%d %d", arr[1], *(p+1));

A void pointer can be used to store addresses of variables of any data type. However, it must be cast before dereferencing. Which statement about void pointers is FALSE?

Consider the code: int arr[] = {5, 10, 15, 20}; int *ptr = arr; ptr++; What does ptr now point to?

Which of the following best describes a dangling pointer situation?

Consider: int x = 5; int *p = &x; int q = &p; What is the value of q?

Which memory allocation function does NOT initialize allocated memory to zero?

Consider: int arr[5] = {1, 2, 3, 4, 5}; int *p = arr; What is the value of *(p+2)?

A function needs to modify a variable in the calling function. Which parameter passing method is appropriate?

Consider: void func(int *arr, int size); This function prototype suggests that func will:

What will be the output of: int x = 10; int *p = &x; printf("%p", p); (assuming typical system output)

What is the difference between pointer and array name in C?

What will be the output? int a[] = {10, 20, 30}; int *p = a; printf("%d", *(p+2));