C Programming · all questions

Pointer
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Q201

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;
    no = 8;
    printf("%d", no);
}

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Q202

Which is an indirection operator among the following?

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Q203

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *a[10] = {"hi", "hello", "how"};
    int i = 0;
    for (i = 0;i < 10; i++)
    printf("%s", a[i]);
}

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Q204

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *s= "hello";
    char *p = s + 2;
    printf("%c\t%c", *p, s[1]);
}

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Q205

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, **p);
}

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Q206

What will be the output of the following C code?

#include <stdio.h>
void foo(int (*ary)[3]);
int main()
{
    int ary[2][3];
    foo(ary);
}
void foo(int (*ary)[3])
{
    int i = 10, j = 2, k;
    ary[0] = &i;
    ary[1] = &j;
    for (k = 0;k < 2; k++)
    printf("%d\n", *ary[k]);
}

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Q207

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *a[1] = {"hello"};
    printf("%s", a[0]);
    return 0;
}

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Q208

What does this declaration say?

int (*(*y)())[2];

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Q209

What will be the output of the following C code?

#include <stdio.h>
int x = 0;
void main()
{
    int *const ptr = &x;
    printf("%p\n", ptr);
    ptr++;
    printf("%p\n ", ptr);
}

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Q210

Comment on the following declaration.

int (*ptr)(); // i)
char *ptr[]; // ii)

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Q211

How many number of pointer (*) does C have against a pointer variable declaration?

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Q212

Which type of variables can have the same name in a different function?

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Q213

Which is true for a, if a is defined as "int a[10][20];"?

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Q214

Which of the following expression is true for the following C statement?

ptr is array with 3 elements of pointer to function returning pointer of int

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Q215

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char a[2][6] = {"hello", "hi"};
    printf("%d", sizeof(a));
    return 0;
}

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Q216

What will be the output of the following C code?

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

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Q217

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int x = 0;
    int *ptr = &x;
    printf("%p\n", ptr);
    ptr++;
    printf("%p\n ", ptr);
}

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Q218

What does argc and argv indicate in command-line arguments?
(Assuming: int main(int argc, char *argv[]) )

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Q219

What are the applications of a multidimensional array?

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Q220

What is the second argument in command line arguments?

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