Quiz for document: Understanding C Pointers

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Understanding C Pointers
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Question 1:
Memory allocated by a malloc call is freed:
  1. When the program releases its memory with a free call .
  2. When the program releases its memory with a free call or the function that issued the malloc call returns.
  3. When the program releases its memory with a free call, the function that issued the malloc call returns, or the pointer that points to the allocated memory wanders outside that memory.
  4. When the program releases its memory with a free call, the function that issued the malloc call returns, or the pointer that points to the allocated memory is reset to NULL.
Question 2:
If you create the following structure and want to pass it by reference to a function, you should put before the variable when you pass it as a parameter to the function: 

                    struct _record {
                      char title[100];
                      char filename[255];
                      unsigned int example_num;
                    } *record;
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