Which of the following statements regarding pointers and arrays in C are CORRECT?
Array decay occurs in expressions/function calls, but sizeof(arr) and &arr prevent decay. Pointer subtraction yields element offset. Adding two pointers (p1 + p2) is illegal in C.
Which of the following operations cause undefined behavior in C pointer arithmetic?
Dereferencing NULL, out-of-bounds access, and operating on freed pointers cause undefined behavior. Subtracting an integer within valid array bounds is completely safe.
Which of the following dynamic memory allocation functions are declared in <stdlib.h>?
All four functions (malloc, calloc, realloc, and free) are standard memory management tools declared in <stdlib.h>.
In C, given array 'int arr[5] = {10, 20, 30, 40, 40};' and pointer 'int *p = arr;', which expressions evaluate to the value 40?
arr[4], *(p + 4), and *(arr + 4) all dereference element index 4 (40). *p + 4 evaluates to 10 + 4 = 14.
In C, given array 'int arr[5] = {10, 20, 30, 40, 50};' and pointer 'int *p = arr;', which expressions evaluate to the value 50?
arr[4], *(p + 4), and *(arr + 4) all dereference element index 4 (50). *p + 4 evaluates to 10 + 4 = 14.