System Calls in C Programming Quiz & Flashcards

What is FILE in C capable of holding?

What happens when a file is opened in read mode?

In which mode should a file be opened to append information to the end of an existing file?

What are the two types of file I/O methods considered in the lecture?

What must be done before any I/O operations on a file can be performed?

FILE is a predefined object type in C for file I/O operations

The file descriptors are used in low-level I/O in C

When a file is opened in read mode, the system creates the file if it does not exist

FILE * stdin is given to fgets to read input from the standard input

To append information to the end of an existing file, the file should be opened in append mode

FILE Object in C

FILE is a predefined object type in C specifically designed for file Input/Output (I/O) operations.
It can hold information related to a file, such as its current position, mode (read, write, append), and end-of-file indicators.

File Opening Modes

Opening a file in read mode allows for reading the file's content. If the file does not exist, the system will not create it, which could lead to an error if a read operation is attempted.
To append information to an existing file, the file must be opened in append mode, ensuring that new data is added to the end without altering existing content.

File I/O Methods

Two types of file I/O methods are considered: high-level and low-level I/O.
High-level I/O typically uses FILE objects and functions like fopen, fread, fprintf, while low-level I/O uses file descriptors and system calls such as open, read, and write.

File Operations Preparation

Before performing any I/O operations on a file, it is essential to open the file using appropriate modes, establishing the context for subsequent operations.

Standard Input

The standard input stream (stdin) can be accessed using FILE * stdin, which is utilized by functions like fgets to read input from the console or user input source.

Test your knowledge on file input/output (I/O), system calls, and the C library with this quiz based on CMPT 214 Lecture 20. Explore topics such as file stream I/O, file descriptors, and the FILE * object type.