C Programming - Input / Output

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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.

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"

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);

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);

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

gets()

fgets()

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