Operating System Activities

Operating System Activities

1. User-System Interface

   • Graphical User Interface (GUI)
   • Command Line Interface (CLI)

2. Program-Hardware Interface

   • OS ensures that hardware does what software wants it to do
   • OS provides the mechanism for the execution of a program

3. Resource Management

   • a program is made of processes and each process needs access to resources
   • resource management aims to achieve optimum efficiency in computer system
   • important aspects
     • process scheduling
     • resolution of conflicts when two processes require the same resource at the same time

4. Memory Management

   • Memory Protection
     • OS makes sure that one program does not try to use the same memory location than other program
   • Memory Organisation
     • OS achieves optimum usage of a limited memory size
   • Memory Usage Optimisation
     • OS makes decisions about what process should be in the main memory or in secondary storage

5. Device Management

   • Installation of driver software
   • Control usage by process

6. File Management

   • File Naming conventions
   • Directory Structures
   • Access Control Mechanisms

7. Security Management

   • Recovery when data is lost
   • Prevention of user intrusion
   • Ensuring Data Privacy

8. Error Detection

   • OS has the ability to interrupt a process and provide error diagnosis
   • OS is able to shut down the computer system without loss of data