C Programming · all questions

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253

Questions

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Q241

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *s = "hello";
    char *p = s;
    printf("%c\t%c", *(p + 1), s[1]);
}

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Q242

Which of the following does not initialize ptr to null (assuming variable declaration of a as int a=0;)?

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Q243

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    double *ptr = (double *)100;
    ptr = ptr + 2;
    printf("%u", ptr);
}

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Q244

What type of initialization is needed for the segment "ptr[3] = '3';" to work?

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Q245

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int k = 5;
    int *p = &k;
    int **m  = &p;
    printf("%d%d%d\n", k, *p, **m);
}

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Q246

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    struct student
    {
        int no;
        char name[20];
    };
    struct student s;
    s.no = 8;
    printf("%s", s.name);
}

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Q247

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int ary[4] = {1, 2, 3, 4};
    int *p = ary + 3;
    printf("%d %d\n", p[-2], ary[*p]);
}

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Q248

What will be the output of the following C code?

#include <stdio.h>
void m(int p, int q)
{
    printf("%d %d\n", p, q);
}
void main()
{
    int a = 6, b = 5;
    m(a);
}

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Q249

What will be the output of the following C code?

#include <stdio.h>
void f(int (*x)(int));
int myfoo(int);
int (*fooptr)(int);
int ((*foo(int)))(int);
int main()
{
    fooptr = foo(0);
    fooptr(10);
}
int ((*foo(int i)))(int)
{
    return myfoo;
}
int myfoo(int i)
{
    printf("%d\n", i + 1);
}

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Q250

Calling a function f with a an array variable a[3] where a is an array, is equivalent to . . . . . . . .

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Q251

What will be the output of the following C code (run without any command line arguments)?

#include <stdio.h>
int main(int argc, char *argv[])
{
    printf("%s\n", argv[argc]);
    return 0;
}

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Q252

What will be the output of the following C code?

#include <stdio.h>
void f(int);
void (*foo)(void) = f;
int main(int argc, char *argv[])
{
    foo(10);
    return 0;
}
void f(int i)
{
    printf("%d\n", i);
}

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Q253

What will be the output of the following C code?

#include <stdio.h>
void m(int p, int q)
{
    int temp = p;
    p = q;
    q = temp;
}
void main()
{
    int a = 6, b = 5;
    m(a, b);
    printf("%d %d\n", a, b);
}

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