Unit 525: Operating Systems Comprehensive Outline

1. Introduction to Operating Systems

• Definition and purpose of an Operating System (OS)
• Types of Operating Systems
  • Batch Operating Systems
  • Time-Sharing Systems
  • Distributed Operating Systems
  • Real-Time Operating Systems
  • Mobile Operating Systems
• Key Functions of an OS
  • Process Management
  • Memory Management
  • File System Management
  • Device Management
  • Security and Access Control
• Role of OS in managing hardware and software resources

2. Process Management

• Concept of a Process
• Process Lifecycle
  • Creation
  • Execution
  • Termination
• Process Scheduling
  • Scheduling Algorithms (FCFS, SJF, Round Robin, Priority)
  • Context Switching
• Process Synchronization
  • Critical Section Problem
  • Semaphores and Mutexes
  • Deadlocks and Prevention Techniques
• Interprocess Communication (IPC)
  • Message Passing
  • Shared Memory

3. Memory Management

• Overview of Memory Hierarchy
• Memory Allocation Techniques
  • Contiguous Allocation
  • Non-contiguous Allocation
• Virtual Memory
  • Concept and Benefits
  • Paging
  • Segmentation
• Page Replacement Algorithms
  • FIFO, LRU, Optimal
• Memory Protection and Sharing

4. File System Management

• File Concept and Attributes
• File Organization Methods
  • Sequential, Direct, Indexed
• File Operations
  • Create, Open, Read, Write, Close, Delete
• Directory Structures
  • Single-Level, Two-Level, Tree-Structured
  • Access Control Lists
• File Access Methods
  • Sequential and Direct Access

5. Device Management

• Role of Device Management in OS
• Device Drivers
  • Functions and Types
• I/O Operations
  • Programmed I/O
  • Interrupt-Driven I/O
  • Direct Memory Access (DMA)
• Interrupt Handling Mechanisms
• Techniques for Efficient Device Management
  • Spooling and Buffering

6. Security and Protection

• Importance of Security in OS
• Access Control Mechanisms
  • Discretionary Access Control (DAC)
  • Mandatory Access Control (MAC)
• Authentication Techniques
  • Passwords, Biometrics, Multi-factor Authentication
• Encryption and Cryptography Basics
• Common Security Threats
  • Malware, Viruses, Worms
  • Denial of Service (DoS) Attacks
• Security Policies and Best Practices

7. Networking and Distributed Systems

• Networking Concepts in OS
  • Network Protocols (TCP/IP, UDP)
  • Network Interface Cards (NIC)
• Client-Server Architecture
• Distributed Systems
  • Characteristics and Benefits
  • Distributed File Systems
  • Remote Procedure Calls (RPC)
• Communication between Networked Devices
  • Socket Programming Basics

8. Virtualization and Cloud Computing

• Introduction to Virtualization
  • Definition and Benefits
• Virtual Machines (VMs)
  • Types and Uses
• Hypervisors
  • Type 1 (Bare Metal) and Type 2 (Hosted)
• Containerization
  • Docker and Kubernetes Overview
• Integration of Cloud Computing Services with OS
  • IaaS, PaaS, SaaS
  • Cloud OS Features

9. Operating System Performance Tuning

• Importance of Performance Tuning
• Resource Monitoring Tools
• Performance Analysis Techniques
• Tuning Parameters
  • CPU, Memory, Disk I/O
• System Optimization Strategies
  • Load Balancing
  • Caching
  • Thread Optimization