C Programming · all questions

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Q241

What is the prototype of scanf function?

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Q242

What will be the output of the following C code?

#include <stdio.h>
#include <math.h>
int main()
{
    int i = 90;
    printf("%f\n", sin(i));
    return 0;
}

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Q243

Which type of files can't be opened using fopen()?

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Q244

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 10, j = 3, k = 3;
    printf("%d %d ", i, j, k);
}

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Q245

What will be the output of the following C function when EOF returns?

int fputs(char *line, FILE *fp)

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Q246

A conversion specification %7.4f means . . . . . . . .

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Q247

puts() function adds newline character.

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Q248

The . . . . . . . . function reads atmost one less than the number of characters specified by size from the given stream and it is stored in the string str.

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Q249

What does tmpfile() returns when it could not create the file?

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Q250

What will be the output of the following C code?

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

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Q251

What will be the output of the following C code?

#include <stdio.h>
#include <stdlib.h>
int main()
{
    printf("%d\n", rand() % 1000);
    return 0;
}

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Q252

If the mode includes b after the initial letter, what does it indicates?

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Q253

What will be the output of the following C code if following commands are used to run (considering myfile exists)?

gcc -otest 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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Q254

What will be the output of the following C code?

scanf(“ %d %d %d”,&n1,&n2);

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Q255

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 10, j = 2;
    printf("%d\n", printf("%d %d ", i, j));
}

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Q256

A fatal error will be generated if the format string is ended with a white space character.

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Q257

Which of the following mode argument is used to truncate?

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Q258

What will be the output of the following C code?

#include <stdio.h>
#include <stdarg.h>
int f(char c, ...);
int main()
{
    char c = 97, d = 98;
    f(c, d);
    return 0;
}
int f(char c, ...)
{
    va_list li;
    va_start(li, c);
    char d = va_arg(li, char);
    printf("%c\n", d);
    va_end(li);
}

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Q259

What does the following command line signify?

prog1|prog2

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Q260

Which function has a return type as char pointer?

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