Unit 527: Operating Systems Comprehensive Outline

1. Introduction to Operating Systems

1.1 Definition and Purpose

• What is an Operating System (OS)?
• Roles and responsibilities of an OS

1.2 Key Functions of Operating Systems

• Resource management
• User interface
• File management
• Process management

1.3 Types of Operating Systems

• Batch operating systems
• Time-sharing systems
• Distributed operating systems
• Real-time operating systems

1.4 Components of Operating Systems

• Kernel
• Shell
• System libraries
• System utilities

2. File Systems and Management

2.1 File System Concepts

• Definition of file system
• File types and attributes

2.2 File Organization

• Sequential, direct, and indexed files

2.3 File Management Techniques

• File creation, deletion, reading, and writing
• Directory structures: single-level, two-level, tree-structured

2.4 File System Types

• FAT, NTFS, ext2/3/4, HFS+

2.5 Managing Files and Directories

• Access permissions
• File system mounting and unmounting

3. Process Management

3.1 Process Concepts

• Definition of a process
• Process states and transitions

3.2 Process Creation and Termination

• Process control block (PCB)
• Process creation methods

3.3 Process Scheduling

• Scheduling criteria
• Scheduling algorithms: FCFS, SJF, Round Robin, Priority

3.4 Process Synchronization

• Critical section problem
• Synchronization primitives: mutex, semaphores

3.5 Interprocess Communication (IPC)

• Shared memory
• Message passing

4. Memory Management

4.1 Memory Hierarchy and Basics

• Primary vs secondary memory

4.2 Memory Allocation Techniques

• Contiguous allocation
• Non-contiguous allocation

4.3 Virtual Memory

• Concept and benefits
• Paging and segmentation

4.4 Page Replacement Algorithms

• FIFO, LRU, Optimal

4.5 Memory Protection and Sharing

• Access control
• Memory isolation

5. Device Management

5.1 Device Drivers

• Purpose and function

5.2 I/O Operations

• Synchronous vs asynchronous I/O

5.3 Interrupt Handling

• Interrupt types
• Interrupt handling process

5.4 Disk Scheduling Algorithms

• FCFS, SSTF, SCAN, C-SCAN

6. Security and Protection

6.1 Security Concepts in Operating Systems

• Threats and vulnerabilities

6.2 Access Control Mechanisms

• Discretionary Access Control (DAC)
• Mandatory Access Control (MAC)

6.3 Authentication Techniques

• Passwords
• Biometrics

6.4 Data Protection

• Encryption
• Backups

7. Operating System Performance

7.1 Performance Measurement

• Benchmarking tools and metrics

7.2 Performance Tuning

• Resource allocation
• Load balancing

7.3 Monitoring Tools

• System monitors
• Logs and alerts

8. Operating System Evolution

8.1 Early Operating Systems

• Mainframe batch systems

8.2 Development of Time-Sharing Systems

8.3 Emergence of Personal Computer OS

• MS-DOS, Windows, Mac OS

8.4 Modern Operating Systems

• Distributed systems
• Mobile OS

8.5 Future Trends

• Cloud OS
• Virtualization and containerization