Unit 520: Operating Systems Fundamentals and Advanced Concepts

1. Introduction to Operating Systems

1.1 Definition and Purpose

• Role in managing hardware and software resources
• User interface provision

1.2 Types of Operating Systems

• Batch Operating Systems
• Time-Sharing Systems
• Distributed Operating Systems
• Real-Time Operating Systems (RTOS)
• Network Operating Systems

1.3 Core Functions of Operating Systems

• Resource Management
• File Management
• Security and Protection
• User Interface

2. Process Management

2.1 Processes and Threads

• Definition and lifecycle of processes
• Multithreading concepts

2.2 Process Scheduling Algorithms

• First-Come, First-Served (FCFS)
• Shortest Job Next (SJN)
• Priority Scheduling
• Round Robin (RR)
• Multilevel Queue Scheduling

2.3 Process Synchronization

• Critical Section Problem
• Semaphores and Mutexes
• Monitors

2.4 Deadlock Handling

• Conditions for Deadlock
• Deadlock Prevention
• Deadlock Avoidance (Banker's Algorithm)
• Deadlock Detection and Recovery

3. Memory Management

3.1 Memory Hierarchy

• Registers, Cache, Main Memory, Secondary Storage

3.2 Virtual Memory

• Concept and benefits
• Paging
• Segmentation

3.3 Memory Allocation Techniques

• Contiguous Allocation
• Non-contiguous Allocation
• Dynamic Memory Allocation

3.4 Memory Management Unit (MMU)

• Role and functioning
• Address translation

4. File System Management

4.1 File Systems Overview

• File concept and attributes

4.2 File Organization and Operations

• Sequential, Indexed, Direct Access
• File creation, deletion, reading, writing

4.3 Directory Structures

• Single-level, Two-level, Hierarchical

4.4 File Allocation Methods

• Contiguous Allocation
• Linked Allocation
• Indexed Allocation

4.5 File System Implementation

• File control block (FCB)
• Free-space management

5. Device Management

5.1 Device Management Concepts

• Types of devices
• Resource allocation

5.2 Device Drivers

• Role and responsibilities

5.3 I/O System

• I/O hardware
• I/O software layers

5.4 I/O Operations and Interrupt Handling

• Programmed I/O
• Interrupt-driven I/O
• Direct Memory Access (DMA)

5.5 Disk Scheduling Algorithms

• FCFS
• SSTF (Shortest Seek Time First)
• SCAN and C-SCAN

6. Security and Protection

6.1 Security Threats

• Types of threats: malware, phishing, unauthorized access

6.2 Protection Mechanisms

• Access control lists
• Capability lists

6.3 Authentication Techniques

• Passwords
• Biometrics
• Multi-factor authentication

6.4 Encryption and Firewalls

• Symmetric and asymmetric encryption
• Firewall types and policies

6.5 Security Policies and Best Practices

7. Operating System Structure

7.1 Architecture of Operating Systems

• Monolithic systems
• Layered systems
• Microkernels

7.2 Kernel Components

• Process management
• Memory management
• File system management

7.3 Shell and User Interface

• Command-line interface (CLI)
• Graphical user interface (GUI)

7.4 System Calls and Utilities

• Types of system calls
• Role of system utilities

8. Distributed Operating Systems

8.1 Introduction to Distributed Systems

• Characteristics and advantages

8.2 Network Operating Systems vs Distributed Operating Systems

8.3 Distributed File Systems

• Concepts and implementations

8.4 Distributed Process Management

• Process synchronization and communication

8.5 Communication Protocols

• Message passing
• Remote procedure calls (RPC)

9. Real-Time Operating Systems (RTOS)

9.1 RTOS Overview

• Definition and applications

9.2 Real-Time Scheduling

• Hard vs Soft real-time systems
• Scheduling algorithms (Rate Monotonic, Earliest Deadline First)

9.3 Task Prioritization and Deadlines

9.4 Concurrency Control in RTOS

9.5 Real-Time Applications in Embedded Systems

10. Operating System Performance

10.1 Performance Evaluation Metrics

• Throughput
• Latency
• CPU utilization

10.2 Optimization Techniques

• Resource allocation
• Load balancing

10.3 Benchmarking and Tuning

• Tools and methodologies

10.4 Monitoring Tools

• System monitors
• Profilers