Operating System Syllabus Overview

Introduction

• Welcome to Gate Smashers
• Importance of subscribing and sharing the channel for updates.

Purpose of the Video

• Discuss the syllabus for Operating Systems, particularly for GATE and UGC NET exams.
• Focus on mandatory topics and subtopics for effective exam preparation.
• Emphasis on smart work along with hard work.

Key Topics in Operating Systems

1. Basic Introduction

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

2. Process Diagram

• Stages a process passes when executed by the CPU
• Importance of understanding this diagram

3. System Calls

• Definition and types of system calls, specifically:
  • Fork system call
  • Kernel system calls

4. Process Scheduling

• Importance of this topic with guaranteed questions in exams
• Key Algorithms:
  • FIFO (First In, First Out)
  • SJF (Shortest Job First)
  • Pre-emptive scheduling
  • Round Robin

5. Process Synchronization

• Concept of Semaphores, especially Binary Semaphores
• Peterson's solution
• Importance of mastering this topic before exams

6. Deadlock and Threads

• Deadlock basics and definitions
• Deadlock Prevention and Avoidance
• Banker's Algorithm – essential for understanding deadlocks

7. Memory Management

• Key Concepts:
  • Paging
  • Segmentation
  • Fragmentation (internal and external)
  • Virtual Memory
• Importance of practicing page replacement algorithms

8. Disk Scheduling

• Numerical problems related to Disk Scheduling
• Key Algorithms:
  • Scan
  • C-Scan
  • FCFS (First Come, First Served)

9. UNIX Commands

• Basic Linux commands like:
  • LS, MKDIR, CD, CHMOD
• System calls related to files and their parameters

10. File Management and Security

• Algorithms for data fetching:
  • Sequential Access
  • Random Access
  • Linked Access
• Basics of security:
  • Definition of viruses, vulnerabilities, and attacks
  • Basic encryption concepts

Importance of Topics

• Mandatory Topics:
  • Process Scheduling
  • Memory Management
  • Disk Scheduling
• Complex Topics:
  • Process Synchronization and Semaphores
  • Deadlock concepts
• Focus on correctness in answers for exams due to negative marking in GATE.

Conclusion

• Review the entire syllabus for effective preparation for various exams.
• Thank you for watching!