C Programming · all questions

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Q121

What will be the output of the following C code?

#include <stdio.h>
#include <string.h>
int main()
{
    char line[3];
    fgets(line, 3, stdin);
    printf("%d\n", strlen(line));
    return 0;
}

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Q122

What will be the output of the following C code?

char str[] =”Good”;
scanf(“%s”, str);

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Q123

What type of return-type used in String operations?

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Q124

The function . . . . . . . . obtains a block of memory dynamically.

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Q125

What happens when we use the following C statement?

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Q126

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp = stdout;
    int n;
    fprintf(fp, "%d ", 45);
    fflush(stdout);
    fprintf(stderr, "%d", 65);
    return 0;
}

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Q127

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *p = calloc(100, 1);
    p = "welcome";
    printf("%s\n", p);
}

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Q128

Explain the format string "%5d%s %c"

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Q129

What is the difference between %e and %g?

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Q130

Strcat() function adds null character.

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Q131

What is the size of array "line" used in fgets(line, maxline, *fp) function?

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Q132

What will be the output of the following C statement?

int ungetc(int c, FILE *fp)

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Q133

In the below C program, every time program is run different numbers are generated.

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

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Q134

What does the ungetc function return for the following C expression?

ungetc(c, fp);//where declarations are int c and FILE *fp

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Q135

If the user enters 1 3.2 s, what value will be returned by the scanf()?

scanf("%d %f %c", &s1, &s2, &s3);

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Q136

Why do we write (int *) before malloc?

int *ip = (int *)malloc(sizeof(int));

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Q137

What type of inputs are accepted by mathematical functions?

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Q138

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp;
    char c;
    int n = 0;
    fp = fopen("newfile1.txt", "r");
    while (!feof(fp))
    {
        c = getc(fp);
        putc(c, stdout);
    }
}

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Q139

What will be the output for the given code.

printf("\n The number is %07d",1212);

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Q140

Which of the following will return a result most quickly for searching a given key?

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