Call backs (True or False): A.) Your program has three functions defined: void a(), void b(), and void c(), followed by your main() function.  Your main() function is allowed to call a(), b(), and c(). (True/False) B.) Your program has three functions defined: void a(), void b(), and void c(), followed by your main() function.  Your main() function is allowed to call c() but cannot call a() or b(). (True/False)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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2.) Call backs (True or False):

A.) Your program has three functions defined: void a(), void b(), and void c(), followed by your main() function.  Your main() function is allowed to call a(), b(), and c(). (True/False)

B.) Your program has three functions defined: void a(), void b(), and void c(), followed by your main() function.  Your main() function is allowed to call c() but cannot call a() or b(). (True/False)

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Explanation

A) Program has three functions defined: void a(), void b(), and void c(), followed by main() function. Your main() function is allowed to call a(), b(), and c()

  • Since function void a(), void b(), and void c() is defined before main() function, It can be accessible in main function
  • If you place the function definitions after main function then we must declare the functions before they're used  by main()
  • So  Statement in A) is True

 

B) Program has three functions defined: void a(), void b(), and void c(), followed by your main() function.  Your main() function is allowed to call c() but cannot call a() or b().

  • Since function void a(), void b(), and void c() is defined before main() function, All of them can be accessible in main function
  • main() can access all three functions(void a(), void b(), and void c()), not just c()
  • So statement in B) is False
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