Learning Objectives
5 objectives- Understand the fundamental concepts, functions, and types of operating systems.
- Analyze various operating system structures and their design principles.
- Explain core OS components such as process and memory management.
- Explore advanced topics including security, distributed systems, real-time OS, and emerging trends.
- Apply theoretical knowledge through case studies of popular operating systems.
Content Outline
PreviewUnit 211: Operating Systems Fundamentals and Advanced Concepts
1. Introduction to Operating Systems
- Definition and purpose of Operating Systems (OS)
- Key functions of OS: resource management, user interface, and system services
- Types of Operating Systems: batch, time-sharing, distributed, real-time, embedded
- Evolution of Operating Systems: from early systems to modern OS
2. Operating System Structures
- Overview of OS architecture
- Monolithic Systems
- Characteristics
- Advantages and disadvantages
- Layered Systems
- Concept and implementation
- Benefits and challenges
- Microkernel Systems
- Design principles
- Communication mechanisms
- Hybrid Systems
- Combination of microkernel and monolithic features
- Examples
3. Process Management
- Definition of processes and threads
- Process states and lifecycle
- Process scheduling algorithms
- First-Come-First-Served (FCFS)
- Shortest Job Next (SJN)
- Priority Scheduling
- Round Robin
- Multilevel Queue
- Process synchronization
- Critical section problem
- Semaphores and mutexes
- Classic synchronization problems (e.g., Producer-Consumer)
- Deadlock
- Conditions for deadlock
- Deadlock prevention, avoidance, detection, and recovery
4. Memory Management
- Memory hierarchy overview
- Contiguous memory allocation
- Paging
- Concept and structure
- Page tables and address translation
- Segmentation
- Segments and segment tables
- Virtual Memory
- Principles and benefits
- Page replacement algorithms (FIFO, LRU, Optimal)
- Memory allocation strategies
- Fixed and dynamic partitioning
- Buddy system
- Slab allocation
5. File Systems
- File concepts and attributes
- File operations (create, delete, read, write, append)
- Directory structures
- Single-level, two-level, tree-structured directories
- Access paths
- File system mounting and unmounting
- File access methods
- Access control mechanisms
- Permissions and protection
- Access Control Lists (ACL)
6. Input/Output Management
- I/O devices and their characteristics
- Device drivers
- I/O techniques
- Programmed I/O
- Interrupt-driven I/O
- Direct Memory Access (DMA)
- Buffering
- Single and double buffering
- Error detection and handling in I/O
7. Security and Protection
- Importance of security in OS
- Access control models
- Authentication techniques
- Encryption basics
- Common security threats
- Viruses, worms, trojans
- Denial of Service attacks
- Privilege escalation
8. Distributed Operating Systems
- Definition and characteristics
- Network protocols relevant to distributed OS
- Distributed file systems
- Communication models
- Message passing
- Remote Procedure Calls (RPC)
- Synchronization and consistency in distributed systems
9. Real-time Operating Systems (RTOS)
- Features of RTOS
- Types: hard vs soft real-time
- Scheduling algorithms in RTOS
- Rate Monotonic Scheduling (RMS)
- Earliest Deadline First (EDF)
- Applications in embedded systems and critical environments
10. Case Studies and Modern Trends
- Case studies
- Windows OS architecture overview
- Unix/Linux OS design and features
- macOS overview
- Emerging trends
- Virtualization technologies
- Containerization (Docker, Kubernetes)
- Cloud computing and OS role
- Mobile OS developments
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