………………. is a high performance, yet completely free, Unix-like operating system, which is suitable for use on a wide range of computers and other products.

1. Windows
2. Unix
3. Linux
4. None of these

What do you call the structure that defines the ways in which files are named and where they are placed logically for storage and retrieval.

1. Operating System
2. Computer System
3. File System
4. None of these

Shell handles the interaction with hardware.

A user's interface to the operating system is called a shell.