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C Programming - Input / Output

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Exercise

"Life is like riding a bicycle. To keep your balance you must keep moving."
- Albert Einstein
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?

A. "I am a boy\r\n\0"B. "I am a boy\r\0"
C. "I am a boy\n\0"D. "I am a boy"

2. 

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

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

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

3. 

What does fp point to in the program ?

#include<stdio.h>

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

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

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+");

A. ReadingB. Writing
C. AppendingD. Read and Write

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;

A. printf("%f %lf", a, b);
B. printf("%Lf %f", a, b);
C. printf("%Lf %Lf", a, b);
D. printf("%f %Lf", a, b);




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