C Programming · all questions

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Q201

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp = stdin;
    int n;
    fprintf(fp, "%d", 45);
}

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Q202

What will be the output of the following C code?

#include <stdio.h>
#include <string.h>
int main()
{
    char *str = "hello, world";
    char *str1 = "hello, world";
    if (strcmp(str, str1))
        printf("equal");
    else
        printf("unequal");
}

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Q203

What is the function of FILE *tmpfile(void)?

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Q204

What happens when zero flag is used with left justification?

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Q205

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int n;
    scanf("%d", n);
    printf("%d\n", n);
    return 0;
}

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Q206

Which of the following is not a valid mathematical function?

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Q207

EOF is an integer type defined in stdio. hand has a value . . . . . . . .

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Q208

What will be the output of the following C code?

#include <stdio.h>
#include <string.h>
int main()
{
    char *str = "hello, world";
    char str1[9];
    strncpy(str1, str, 9);
    printf("%s %d", str1, strlen(str1));
}

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Q209

What will be the output of the following C code if following commands are used to run and if myfile does not exist?

gcc -o test test.c
./test > myfile

#include <stdio.h>
int main(int argc, char **argv)
{
    char c = 'd';
    putchar(c);
    printf(" %d\n", argc);
}

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Q210

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char c = '�';
    putchar(c);
}

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Q211

What is function srand(unsigned)?

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Q212

What is the purpose of the C function?

int ferror(FILE *fp)

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Q213

What if size is zero in the following C statement?

realloc(ptr, size)

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Q214

Select the right explanation to the given code.

printf(“%*. *f”, 5,4,5700);

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Q215

Which of the following should be used for freeing the memory allocated in the following C code?

#include <stdio.h>
struct p
{
    struct p *next;
    int x;
};
int main()
{
    struct p *p1 = (struct p*)malloc(sizeof(struct p));
    p1->x = 1;
    p1->next = (struct p*)malloc(sizeof(struct p));
    return 0;
}

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Q216

Which of the following function with ellipsis are illegal?

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Q217

What will be the output of the following C code?

#include <stdio.h>
struct p
{
    struct p *next;
    int x;
};
int main()
{
    struct p *p1 = calloc(1, sizeof(struct p));
    p1->x = 1;
    p1->next = calloc(1, sizeof(struct p));
    printf("%d\n", p1->next->x);
    return 0;
}

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Q218

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

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Q219

How many characters for pushback is guaranteed per file while using ungetc(c, fp);?

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Q220

Which of the following function can be used to terminate the main() function from another function safely?

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