C | Take the Quiz | QuizMaker

1. Comment on the output of this C code?

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int const k = 5;
```
```
        k++;
```
```
        printf("k is %d", k);
```
```
    }
```

a) k is 6

b) Error due to const succeeding int

c) Error, because a constant variable can be changed only twice

d) Error, because a constant variable cannot be changed

2. What is the output of this C code?

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int a = 2 + 3 - 4 + 8 -  5 % 4;
```
```
        printf("%d\n", a);
```
```
    }
```

a) 0

b) 8

c) 11

d) 9

3. Which of the following is an invalid assignment operator?

a) a %= 10;

b) a /= 10;

c) a |= 10;

d) None of the mentioned

4. #pragma exit is primarily used for?

a) Checking memory leaks after exitting the program

b) Informing Operating System that program has terminated

c) Running a function at exitting the program

d) No such preprocessor exist

5. What is the scope of a function?

a) Whole source file in which it is defined

b) From the point of declaration to the end of the file in which it is defined

c) Any source file in a program

d) From the point of declaration to the end of the file being compiled

6. What is the output of this C code?

```
    #include <stdio.h>
```
```
    struct p
```
```
    {
```
```
        int x[2];
```
```
    };
```
```
    struct q
```
```
    {
```
```
        int *x;
```
```
    };
```
```
    int main()
```
```
    {
```
```
        struct p p1 = {1, 2};
```
```
        struct q *ptr1;
```
```
        ptr1->x = (struct q*)&p1.x;
```
```
        printf("%d\n", ptr1->x[1]);
```
```
    }
```

a) Compile time error

b) Segmentation fault/code crash

c) 2

d)0

7. Which loop is most suitable to first perform the operation and then test the condition?

a) for loop

b) while loop

c) do-while loop

d) none of the mentioned

8. What is the output of this C code?

```
 #include <stdio.h>
```
```
    int foo(int, int);
```
```
    #define foo(x, y) x / y + x
```
```
    int main()
```
```
    {
```
```
        int i = -6, j = 3;
```
```
        printf("%d ",foo(i + j, 3));
```
```
        #undef foo
```
```
        printf("%d\n",foo(i + j, 3));
```
```
    }
```
```
    int foo(int x, int y)
```
```
    {
```
```
        return x / y + x;
```
```
    }
```

a) -8 -4

b) Compile time error

c) -8 -8

d) Undefined behaviour

9. Which of the following properties of #define not true?

a) You can use a pointer to #define

b) #define can be made externally available

c) They obey scope rules

d) All of the mentioned

10. Which of the following mathematical function requires 2 parameter for successful function call?

a) fmod();

b) div();

c) atan2();

d) all of the mentioned