Learn C: Files

If errno contains a nonzero number, is there an error?

What is a stream?

How do you redirect a standard stream?

How would you use the functions fseek(), freed(), fwrite() and ftell()?

What is a file?

what are the types of file?

What is meant by file opening?

What is a file pointer?

How is a file closed ?

What is a random access file?

how to merge to file in c? 

Can include files be nested?

Write a program for creating your own header file and library function?

How can I open a file so that other programs can update it at the same time?

How can I create the batch files? What is the purpose batch file and use of it? 

How can we read/write structures from/to data files? 

In header files whether functions are declared or defined?

What will be the content of 'file.c' after executing the following program?#include<stdio.h>
int main(){ 
FILE *fp1, *fp2; 
fp1=fopen("file.c", "w"); fp2=fopen("file.c", "w"); 
fputc('A', fp1); 
fputc('B', fp2); 
fclose(fp1); 
fclose(fp2); 
return 0;
}

If the file 'source.txt' contains a line "Be my friend" which of the following will be the output of below program?
#include<stdio.h>
int main(){ 
 FILE *fs, *ft; 
char c[10]; 
fs = fopen("source.txt", "r"); 
c[0] = getc(fs); 
fseek(fs, 0, SEEK_END); 
fseek(fs, -3L, SEEK_CUR); 
fgets(c, 5, fs); 
puts(c); return 0;
}

What will be the output of the program ?#include<stdio.h>int main(){ 
FILE *ptr; char i; 
 ptr = fopen("myfile.c", "r"); while((i=fgetc(ptr))!=NULL) printf("%c", i); return 0;}

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

Which of the following operations can be performed on the file "NOTES.TXT" using the below code?

FILE *fp;fp = fopen("NOTES.TXT", "r+");

What is the purpose of ftell ?

What is the purpose of rewind() ?

What is the use of header file in c?

What is File Mode?.Types Of file mode?.What is Pointer?.which one is most useful in Structure or Unoin?

How can you restore a redirected standard stream? 

how to read a file line by line and print it reverse 

WRITE C PROGRAMME TO CREATE A FILE AND READ A FILE. 

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

What are header files? Are functions declared or defined in header files ?

When we open a file, how does functions like fread( )/fwrite( ), etc. get to know from where to read or to write the data?

How to obtain a path of the given file?

How to obtain a path of the given file?