Coding club Summit Online Quiz

In C, what is the purpose of the restrict keyword

• Specifies that a pointer is the only pointer to the data

• Allocates memory dynamically

• Declares a variable as a constant

• Specifies that a variable cannot be modified

What is the primary use of the setjmp and longjmp functions in C

• Memory allocation

• Exception handling

• Dynamic linking

• File I/O operations

What will be the output of the following C code?

 

    #include <stdio.h>

    void main()

    {

        int a[3] = {1, 2, 3};

        int *p = a;

        printf("%p\t%p", p, a);

    }

• Same address is printed

• Different address is printed

• Compile time error

• Nothing

What will be the output of the following code snippet?

#include <stdio.h>

int main() {

    int a, b = 5;

    a = b + NULL;

    printf("%d", a);

    return 0;

}

• Compilation Error      

• Runtime Error       

• Logical Error        

• None of these

What is the output of the following code snippet?

#include <stdio.h>

int main() {

    int x = 10;

    int *ptr = &x;

    printf("%d", *ptr);

    return 0;

}

• Memory address of x

• 10

• Compilation error

• None of these

What will be the output of the following C code?

void main() {

  char *p;

  p = "Hello";

  printf("%c\n", &p);

}

• Hello

• E

• Some address will be printed

• None of these

What will be the output of the following C code?

#include <stdio.h>

    int main()

    {

        int i = 97, *p = &i;

        ABC(&i);

        printf("%d ", *p);

    }

    void ABC(int *p)

    {

        int j = 2;

        p = &j;

        printf("%d ", *p);

    }

• 2   97

• 2   2

• Compile time error

• Segmentation fault/code crash

Which of the following is FALSE about typedef

• typedef follow scope rules

• typedef defined substitutes can be redefined again. (Eg: typedef char a; typedef int a;)

• You cannot typedef a typedef with other term.

• All of the mentioned

void * malloc(size_t n) returns:

• Pointer to n bytes of uninitialized storage

                    

• NULL if the request cannot be satisfied

• Nothing

• Both a & b are true   

What will be the output of the following C code?

 

    #include <stdio.h>

    int main()

    {

        int i = 10;

        int *const p = &i;

        XYZ(&p);

        printf("%d\n", *p);

    }

    void XYZ(int **p)

    {

        int j = 11;

        *p = &j;

        printf("%d\n", **p);

    }

• 10 11

• Compile time error

• Segmentation fault/code-crash

• None of these