21. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            void *ptr1;
            int var[5] = {50, 60, 70, 80, 90};
            ptr1 = &var[3];
            int *ptr2 = &var[4];
            int m = (int*)ptr1 - ptr2;
            printf("%d\n", m);
        }
    

1. 1. 90

   
   
   

   2. Compilation Error

   
   
   

   3. Garbage value

   
   
   

   4. -1

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   -1

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22. Comment on the output of the following C code.
    

    #include <stdio.h>
        int main()
        {
            char *s = "Interveiw" //Line 1
            char *p = "Mania\n"; //Line 2
            s = p; //Line 3
            printf("%s, %s\n", s, p); //Line 4
        }
    

1. 1. Output will be Interveiw, Mania

   
   
   

   2. You cannot assign pointer like in Line 3

   
   
   

   3. Memory holding “this” is cleared at line 3

   
   
   

   4. Memory holding “this” loses its reference at line 3

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Memory holding “this” loses its reference at line 3

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23. What is the syntax for constant pointer to address (i.e., fixed pointer address)?

1. 1. <type> const * <name>

   
   
   

   2. const <type> * <name>

   
   
   

   3. <type> * const <name>

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   <type> * const <name>

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24. What type of initialization is needed for the segment “p[3] = ‘3’;” to work?

1. 1. int *p= "Interview",

   
   
   

   2. char *p = “Interview!”;

   
   
   

   3. char p[] = “Interview!”;

   
   
   

   4. both char *p = “Interview!”; and char p[] = “Interview!”;

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   char p[] = “Interview!”;

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25. What will be the output of the following C code?
    

    #include <stdio.h>
        int calc(int n, int m)
        {
            return n + m;
        }
        int main()
        {
            int (*calc_ptr)(int, int);
            calc_ptr = calc;
            printf("The Addition of two numbers is: %d", (int)calc_ptr(21, 13));
        }
    

1. 1. 21

   
   
   

   2. 13

   
   
   

   3. Compilation Error

   
   
   

   4. 34

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   34

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