Operating System Curriculum

Introduction

• Subscribe to the Channel: Subscribe if watching for the first time.
• Purpose of the Video: Important topics for operating systems in GATE and UGC NET.
• Important Topics: Identification of essential and optional topics.

Basic Introduction

• Definition: Fundamental definition of an operating system.
• Types:
  • Batch operating system
  • Multi-programming, multi-tasking
  • Real-time system

Processes and System Calls

• Process Diagram: Stages of a process
• System Calls:
  • Fork system call
  • Basic kernel and fork

Process Scheduling

• Algorithms:
  • FIFO
  • SGF (Shortest Job First)
  • Preemption
  • Round Robin
  • Priority algorithm
• Importance: A question appears every year in GATE and UGC NET.

Process Synchronization

• Semaphore Concept:
  • Binary semaphore
• Peterson's Solution

Deadlocks and Threads

• Deadlock Definition:
  • Prevention and avoidance
  • Banker's algorithm

Memory Management

• Paging and Segmentation:
  • Internal and external fragmentation
  • Virtual memory
  • Page replacement algorithms

Disk Scheduling

• Algorithms:
  • SCAN, C-SCAN
  • FCFS

UNIX Commands

• Main Commands:
  • ls, mkdir, cd

File Management and Security

• File Access Methods:
  • Sequential, random, linked access
• Viruses and Attacks:
  • Basic definitions

Conclusion

• Important Topics:
  • Process scheduling, memory management, disk scheduling, process synchronization, and deadlocks
• Safe Preparation: Focus on covering the curriculum correctly.