51. Which of the following is true for "call by reference" in C program?

1. 1. Called function can alter the value of variable passed from calling function

   
   
   

   2. Called function creates a private temporary copy of the passed argument and modifies it.

   
   
   

   3. Both A and B are false

   
   
   

   4. A is true

   
   
   

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1. View Hint View Answer Discuss in Forum

   In case of call by reference, called function has access to original argument.

   Correct Option: A

   Call by reference allows called program to access and modigy the original value of the argument passed.
   Called function does not need to create a copy of the argument passed

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52. Which of the following is true for "call by value" in C?

1. 1. Called function has access to original argument

   
   
   

   2. Called function creates a local copy of the passed argument

   
   
   

   3. Both A and B are true

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   arguments passed to called funtion are local to the calling function. Calling function cannot modify its value

   Correct Option: B

   pass by value means that called function is given the value of its arguments in temporary variables rathen than originals.
   

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53. Which of the following function with ellipsis are illegal?
    

1. 1. void func(int, int, …);

   
   
   

   2. void func(int, …);

   
   
   

   3. void func(…);

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   void func(…);

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

    #include <stdio.h>
        int main()
        {
            struct NN
            {
                char *name;
                struct NN *next;
            };
            struct NN *ptrary[10];
            struct NN n, nn;
            n.name = "Rahul";
            n.next = NULL;
            ptrary[0] = &n;
            nn.name = (char*)malloc(sizeof(char)*3);
            strcpy(nn.name, n.name);
            nn.next = &nn;
            ptrary[1] = &nn;
            printf("%s\n", ptrary[1]->next->next->name);
        }
    

1. 1. Rahul

   
   
   

   2. Garbage value

   
   
   

   3. Compilation Error

   
   
   

   4. Undefined behaviour

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Rahul

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

    #include <stdio.h>
        struct Employee
        {
            char str[];
        };
        void main()
        {
            struct Employee Emp;
            printf("%d", sizeof(struct Employee));
        }
    

1. 1. Garbage value

   
   
   

   2. Undefined behaveiour

   
   
   

   3. Nothing

   
   
   

   4. Size of char

   
   
   

   5. Compilation Error

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   Compilation Error
   

   main.c:4:14: error: flexible array member in a struct with no named members
            char str[];
   

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