11. Where are the uninitialized global variables stored?

1. 1. stack segment

   
   
   

   2. heap segment

   
   
   

   3. text segment

   
   
   

   4. BSS

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Uninitialized global variables are not local to a function, their lifetime is throughout program execution and scope is throughout the file.

   Correct Option: D

   BSS is Block Started by Symbol.
   All uninitialzed global variables are stored into this segment,

---

12. On freeing a dynamic memory, if the pointer value is not modified, then the pointer points to.
    

1. 1. It points back to location it was initialized with

   
   
   

   2. NULL

   
   
   

   3. Other dynamically allocated memory

   
   
   

   4. The same deallocated memory location

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   The same deallocated memory location

---

---

13. Which of the following should be used for freeing the memory allocated in the following C code?
    

    #include <stdio.h>
        struct p
        {
            struct p *next;
            int n;
        };
        int main()
        {
            struct p *ptr1 = (struct ptr*)malloc(sizeof(struct p));
            ptr1->n = 1;
            ptr1->next = (struct ptr*)malloc(sizeof(struct p));
            return 0;
        }
    

1. 1. free(ptr1);

   
   
   

   2. free(ptr1);
         free(ptr1->next)
      

   
   
   

   3. free(ptr1->next);
         free(ptr1);
      

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   free(ptr1->next);
      free(ptr1);
   

---

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

    #include <stdio.h>
        struct p
        {
            struct p *next;
            int n;
        };
        int main()
        {
            struct p *ptr1 = calloc(1, sizeof(struct p));
            ptr1->n = 1;
            ptr1->next = calloc(1, sizeof(struct p));
            printf("%d\n", ptr1->next->n);
            return 0;
        }
    

1. 1. 0

   
   
   

   2. 1

   
   
   

   3. Somegarbage value

   
   
   

   4. Compilation Error

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   0

---

---

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

    #include <stdio.h>
        struct p
        {
            struct p *next;
            int n;
        };
        int main()
        {
            struct p* ptr1 = malloc(sizeof(struct p));
            ptr1->n = 1;
            ptr1->next = malloc(sizeof(struct p));
            printf("%d\n", ptr1->next->n);
            return 0;
        }
    

1. 1. Garbage value

   
   
   

   2. 1

   
   
   

   3. 0

   
   
   

   4. Compilation error

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Garbage value

---