Unit 529: Operating Systems Fundamentals

1. Introduction to Operating Systems

• Definition and purpose of an operating system (OS)
• Core functions of an OS: resource management, user interface, file management
• Types of operating systems:
  • Batch OS
  • Time-sharing OS
  • Distributed OS
  • Real-time OS
• Role of OS in managing hardware and software

2. File Systems and Management

• Concept of file systems
• Types of file systems (e.g., FAT, NTFS, ext3/ext4)
• File organization and directory structures
• File operations: creation, deletion, reading, writing
• Storage devices and data storage hierarchy
• File management techniques:
  • Allocation methods (contiguous, linked, indexed)
  • Access methods (sequential, direct)

3. Process Management

• Definition of a process
• Process lifecycle and states (new, ready, running, waiting, terminated)
• Process control block (PCB)
• Process scheduling algorithms:
  • First-Come-First-Serve (FCFS)
  • Shortest Job Next (SJN)
  • Round Robin (RR)
  • Priority Scheduling
• Inter-process communication (IPC) mechanisms
• Synchronization and deadlock basics

4. Memory Management

• Memory hierarchy overview
• Concepts of physical and virtual memory
• Memory allocation techniques:
  • Contiguous allocation
  • Paging
  • Segmentation
• Virtual memory and paging mechanisms
• Memory protection and sharing

5. Device Management

• Overview of hardware devices and their interaction with OS
• Device drivers and their role
• I/O operations and buffering
• Interrupt handling and polling
• Device management strategies

6. Security and Protection

• Importance of security in operating systems
• Access control models and mechanisms
• Authentication techniques
• Encryption basics
• Techniques for ensuring system integrity and confidentiality

7. Operating System Performance

• Metrics for measuring OS performance
• Benchmarking methods
• Monitoring tools and utilities
• Strategies for performance optimization

8. Operating System Design Principles

• Principles of modularity and layering
• System organization and kernel architecture
• Trade-offs in OS design (performance vs. complexity, security vs. usability)
• Examples of design considerations

9. Case Studies in Operating Systems

• Overview of Windows OS architecture and features
• Linux OS design and its open-source nature
• macOS structure and Unix-based foundations
• Evolution and technological advancements in operating systems
• Practical implications of theoretical concepts across OS examples