1. In a file contains the line "I am a boy\r\n" then on reading this line into the array str using fgets(). What will str contain?

"I am a boy\r\n\0"
"I am a boy\r\0"
"I am a boy\n\0"
"I am a boy"

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2. What is the purpose of "rb" in fopen() function used below in the code?

FILE *fp;
fp = fopen("source.txt", "rb");

open "source.txt" in binary mode for reading
open "source.txt" in binary mode for reading and writing
Create a new file "source.txt" for reading and writing
None of above

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3. What does fp point to in the program ?

#include<stdio.h>

int main()
{
    FILE *fp;
    fp=fopen("trial", "r");
    return 0;
}

The first character in the file
A structure which contains a char pointer which points to the first character of a file.
The name of the file.
The last character in the file.

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4. Which of the following operations can be performed on the file "NOTES.TXT" using the below code?
FILE *fp;
fp = fopen("NOTES.TXT", "r+");

Reading
Writing
Appending
Read and Write

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5. To print out a and b given below, which of the following printf() statement will you use?

#include<stdio.h>

float a=3.14;
double b=3.14;

printf("%f %lf", a, b);
printf("%Lf %f", a, b);
printf("%Lf %Lf", a, b);
printf("%f %Lf", a, b);

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6. Which files will get closed through the fclose() in the following program?

#include<stdio.h>

int main()
{
    FILE *fs, *ft, *fp;
    fp = fopen("A.C", "r");
    fs = fopen("B.C", "r");
    ft = fopen("C.C", "r");
    fclose(fp, fs, ft);
    return 0;
}

"A.C" "B.C" "C.C"
"B.C" "C.C"
"A.C"
Error in fclose()

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7. On executing the below program what will be the contents of 'target.txt' file if the source file contains a line "To err is human"?
#include<stdio.h>

int main()
{
    int i, fss;
    char ch, source[20] = "source.txt", target[20]="target.txt", t;
    FILE *fs, *ft;
    fs = fopen(source, "r");
    ft = fopen(target, "w");
    while(1)
    {
        ch=getc(fs);
        if(ch==EOF)
            break;
        else
        {
            fseek(fs, 4L, SEEK_CUR);
            fputc(ch, ft);
        }
    }
    return 0;
}

r n
Trh
err
None of above

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8. To scan a and b given below, which of the following scanf() statement will you use?

#include<stdio.h>

float a;
double b;

scanf("%f %f", &a, &b);
scanf("%Lf %Lf", &a, &b);
scanf("%f %Lf", &a, &b);
scanf("%f %lf", &a, &b);

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9. Out of fgets() and gets() which function is safe to use?

gets()
fgets()

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10. Consider the following program and what will be content of t?

#include<stdio.h>

int main()
{
    FILE *fp;
    int t;
    fp = fopen("DUMMY.C", "w");
    t = fileno(fp);
    printf("%d\n", t);
    return 0;
}

size of "DUMMY.C" file
The handle associated with "DUMMY.C" file
Garbage value
Error in fileno()

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C Language - Input/Output

C Language - Input/Output

C Language