What is the difference between 'r' and 'w' modes when opening a file in C?
A. 'r' is for read-only and 'w' is for write-only
B. 'r' is for reading and 'w' is for reading and writing
C. 'r' is for read-only and 'w' is for write-only, creating a new file
D. 'r' is for reading and 'w' is for writing, overwriting an existing file
Answer: Option D
This Question Belongs to C Program >> File Input Output
In C, which library is used for file operations such as reading and writing files?
A. stdio.h
B. iostream.h
C. fileio.h
D. files.h
Which function is used to open a file in C for writing?
A. fopen()
B. open()
C. writefile()
D. createfile()
What does 'FILE' represent in C when working with files?
A. A built-in data type for files
B. A file descriptor
C. A file pointer
D. A file structure
How do you check if a file was opened successfully in C?
A. Use the 'filestatus' variable
B. Check the return value of fopen()
C. Use the 'fileopen' function
D. Check the file's size
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