How will you free the allocated memory ?

How will you free the allocated memory ?

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1) What is the output of this C code?

#include <stdio.h>
     struct student
     {
         int no = 5;
         char name[20];
     };
     void main()
     {
         struct student s;
         s.no = 8;
         printf("hello");
     }

2) User-defined data type can be derived by___________

3) What is the similarity between a structure, union and enumeration?

4) What is the output of this C code?

#include <stdio.h>
     struct     {
         int k;
         char c;
     };
     int main()
     {
         struct p;
         p.k = 10;
         printf("%d\n", p.k);
     }

5) What is the output of this C code(according to C99 standard)?

#include <stdio.h>
     struct p     {
         int k;
         char c;
         float f;
     };
     int main()
     {
         struct p x = {.c = 97, .k = 1, 3};
         printf("%f \n", x.f);
     }