Operating Systems

Welcome to the comprehensive Operating Systems course. This subject forms the backbone of computer science — understanding how an OS works gives you deep insight into everything from app performance to system security.

What You Will Learn

This course covers operating systems from the ground up:

• Fundamentals — What an OS is, its types, structure, and how it boots
• Process Management — Processes, threads, scheduling, and inter-process communication
• CPU Scheduling — FCFS, SJF, Priority, Round Robin, and multilevel queues
• Process Synchronization — Critical sections, semaphores, monitors, and classic problems
• Deadlocks — Detection, prevention, avoidance, and Banker's algorithm
• Memory Management — Paging, segmentation, virtual memory, and page replacement
• File Systems — Allocation methods, directory structures, and implementation
• I/O Systems — Device drivers, interrupts, DMA, and disk scheduling
• Storage Management — RAID, disk structure, and swap space
• Security & Protection — Access control, authentication, and threat prevention
• Modern & Distributed OS — Cloud OS, RTOS, virtualization
• Linux/Unix — Commands, shell scripting, and internals

How to Use This Guide

Each topic follows a consistent structure: What it is → Why it matters → How it works → Examples → Common Problems → Key Takeaways. Start from the Introduction section and progress sequentially, or jump to any topic you need to review.

Prerequisites

• Basic understanding of computer architecture (CPU, RAM, storage)
• Familiarity with at least one programming language (C preferred)
• Understanding of data structures (linked lists, queues, trees)