Unit 283: Operating Systems Fundamentals

1. Introduction to Operating Systems

• Definition and purpose of operating systems (OS)
• Role in managing hardware resources (CPU, memory, I/O devices)
• Role in managing software resources
• Importance in user interaction and system usability

2. Types of Operating Systems

• Single-user OS
  • Characteristics
  • Examples and use cases
• Multi-user OS
  • Characteristics
  • Examples and use cases
• Real-time OS
  • Definition and requirements
  • Examples and applications
• Embedded Systems
  • Characteristics
  • Typical devices and examples

3. Operating System Components

• Kernel
  • Role and functions
  • Types (monolithic, microkernel, hybrid)
• File system
  • Structure and organization
  • File management
• Device drivers
  • Purpose and interaction with hardware
• User interface
  • Graphical User Interface (GUI)
  • Command Line Interface (CLI)
• System utilities
  • Common utilities and their functions

4. Process Management

• Definition of a process
• Process states (new, ready, running, waiting, terminated)
• Process scheduling
  • Scheduling algorithms (FCFS, Round Robin, Priority, etc.)
• Process creation and termination
• Inter-process communication (IPC) methods
  • Shared memory
  • Message passing

5. Memory Management

• Memory allocation techniques
  • Contiguous and non-contiguous allocation
• Virtual memory concepts
• Paging and segmentation
• Memory protection and sharing
• Handling memory leaks and fragmentation

6. File System Management

• File system structure and organization
• File operations (create, read, write, delete)
• File access methods (sequential, direct)
• Access control and permissions
• Disk management and space allocation strategies

7. Device Management

• Role of device management in OS
• Device drivers and their interface
• Input/Output (I/O) operations
• Interrupt handling and management
• Device allocation and resource sharing

8. User Interface and Shell

• Graphical User Interface (GUI)
  • Features and components
• Command Line Interface (CLI)
  • Commands and scripting
• Shell environments
  • Functions and customization
  • Shell scripting basics

9. Security and Protection

• Security features in OS
• Access control mechanisms
• User authentication methods
• Encryption techniques
• Protection against malware and unauthorized access

10. Operating System Evolution and Trends

• Historical development
  • Early batch processing systems
  • Time-sharing and multiprogramming
  • Introduction of GUIs
• Modern OS features
  • Virtualization
  • Containerization
  • Cloud-based OS
  • Internet of Things (IoT) integration