Operating Systems & File Systems

Question 1

What are some OS Services? (3)

Answer 1

• File Operations
• Network Connections
• User accounts

Question 2

Ways to access services? (3)

Answer 2

1. Graphical User Interface (GUI)
2. Shell (Layer in front of the GUI)
3. Application Programming Interface

Question 3

Describe a GUI

Answer 3

Interacts with the system

Question 4

Describe the function of the Shell

Answer 4

Command-line interface to the OS

• Commands are entered as plain text strings
• Used by both users and programs

Question 5

Describe the function of the Application Programming Interface

Answer 5

• “System calls”

- Allows programs to interact with the OS and each other