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💻 CS330 — Introduction to Operating Systems

This course introduces the core concepts behind modern operating systems. It focuses on how operating systems manage hardware, processes, memory, storage, synchronization, and file systems — using real-world examples from Unix and Windows to connect theory to practice.

This section contains structured study material including chapter notes, quizzes and practice questions, a course summary, and a cheat sheet for revision. The goal is a clear, practical resource for understanding operating systems concepts and preparing for exams and assessments.

🧭 How to Use This Section

Depending on where you are in the course, use this section differently.

If you are following the course, start from Chapter 1 and continue in order. If you are revising, focus on the cheat sheet, summary, and quizzes. If you are working on the Unix/Linux project, use the relevant chapters as references for commands and concepts.

🗂 Course Chapters

  • 1⃣ Chapter 1 — Introduction to Operating Systems

    Evolution and purpose of operating systems, OS components and architecture, types of OS, and basic functions and responsibilities.

  • 2⃣ Chapter 2 — Operating System Services

    System calls and APIs, user and kernel modes, OS design and implementation, and command interpreters.

  • 3⃣ Chapter 3 — Process Management

    What processes are, process states and transitions, the Process Control Block, context switching, and process creation.

  • 4⃣ Chapter 4 — Threads

    Processes vs. threads, multithreading models, benefits and challenges of threading, and thread libraries.

  • 5⃣ Chapter 5 — CPU Scheduling

    Scheduling criteria, preemptive and non-preemptive scheduling, FCFS, SJF, Priority, Round Robin, Multilevel Queue, and performance evaluation.

  • 6⃣ Chapter 6 — Synchronization

    Race conditions, critical sections, mutual exclusion, semaphores, monitors, classical synchronization problems, and deadlock avoidance.

  • 7⃣ Chapter 8 — Memory Management

    Contiguous allocation, paging, segmentation, fragmentation, and allocation strategies.

  • 8⃣ Chapter 9 — Virtual Memory

    Demand paging, page replacement algorithms, thrashing, working set models, and virtual memory performance.

  • 9⃣ Chapter 10 — Mass Storage Structure

    Disk structure and scheduling, RAID levels, and storage device management.

  • 🔟 Chapter 11 — File System Interface

    File concepts and attributes, directory structures, access methods, and file protection mechanisms.

  • 📁 Chapter 12 — File System Implementation

    File system layout, contiguous/linked/indexed allocation, free space management, and directory implementation.

🐧 Practical Work — Unix & Linux Project

This part of the course focuses on hands-on experience with Unix and Linux systems. Work covered includes core Unix commands, system navigation and file operations, permissions and access control, and team-based problem-solving activities.

🗒 Study & Revision Material

In addition to the chapter notes, this section includes a cheat sheet for quick revision, a full course summary, and quizzes and practice questions across multiple chapters. These are designed to support both deep understanding and efficient exam preparation.

Step Topic
1 Chapters 1 & 2 — OS concepts and services
2 Chapters 3 & 4 — Processes and threads
3 Chapter 5 — CPU scheduling
4 Chapter 6 — Synchronization — conceptually important
5 Chapters 8 & 9 — Memory management and virtual memory
6 Chapters 10–12 — Storage and file systems
7 Cheat sheet, summary, and quizzes for revision

About This Material

These notes are based on my own coursework and personal study. The focus is on clarity, structure, and practical understanding. Content will continue to be refined and expanded over time.