Operating System Syllabus Overview

Introduction

• Welcome to Gate Smashers
• Topic: Syllabus of Operating System
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Purpose of the Video

• Clarifying mandatory topics for GATE and UGC NET exams.
• Providing an overview of important topics based on past questions.
• Aimed at late preparation or comprehensive study.

Importance of Smart Work

• Hard work is essential, but smart work is equally important.
• Example: Jeff Bezos as a model of smart work without traditional manufacturing.

Key Topics in Operating System

1. Basic Introduction

• Definition of Operating System.
• Types of Operating Systems:
  • Batch Operating System
  • Multi-programming
  • Multi-tasking
  • Real-time Operating System

2. Process Management

• Process Diagram: Stages a process goes through during execution.
• System Calls:
  • Fork System Call
  • Kernel System Calls
• Process Scheduling (Mandatory Topic):
  • Includes scheduling algorithms like:
    • FIFO
    • SJF
    • Pre-emptive
    • Round Robin

3. Process Synchronization

• Concept of Semaphore (Mandatory):
  • Focus on Binary Semaphore.
  • Peterson’s solution for process synchronization.

4. Deadlock and Threads

• Deadlock: Basic definitions and concepts.
• Deadlock Prevention & Avoidance:
  • Banker's Algorithm (Essential).

5. Memory Management

• Key Concepts:
  • Paging
  • Segmentation
  • Fragmentation (internal and external).
• Virtual Memory: Basics and thrashing concepts.
• Page Replacement Algorithms: Important and easy to solve.

6. Disk Scheduling

• Algorithms:
  • Scan Algorithm
  • CScan Algorithm
  • FCFS
  • Numerical practice available in videos.

7. UNIX Commands

• Important for UGC NET, lesser focus on GATE.
• Basic Linux Commands:
  • Examples: LS, MKDIR, CD, CHMOD.
  • Open system call and file-related system calls.

8. File Management and Security

• Data fetching algorithms: Sequential, Random, Linked Access.
• Basic definitions of:
  • Virus
  • Vulnerabilities
  • Loopholes
  • Types of attacks.

Conclusion

• Key areas to focus:

  1. Process Scheduling (Double Star: Must do)
  2. Memory Management (Must do)
  3. Disk Scheduling (Practice recommended)
  4. Process Synchronization and Deadlock (Complex)
  5. Basic understanding of Threads.

• Entire syllabus covers essential topics for various exams.

• Thank you for watching!