CSE 406 — Operating System Lab 🖥️

Python implementations of classic CPU scheduling, disk scheduling, and page replacement algorithms, written as part of the CSE 406 Operating System Lab course.

📋 Algorithms Implemented

CPU Scheduling

File	Algorithm
FCFS.py	First Come First Serve
SJF.py, Sjf.py	Shortest Job First
PriorityScheduling.py	Priority Scheduling
RoundRobin.py	Round Robin

Disk Scheduling

File	Algorithm
FCFS_DiskScheduling.py	First Come First Serve (Disk)
SSTF_DiskScheduling.py	Shortest Seek Time First
CScanDiskScheduling.py	C-SCAN
scandiskscheduling.py	SCAN

Page Replacement

File	Algorithm
FIFOPageReplacement.py	FIFO Page Replacement
FIFO(final_exam).py	FIFO Page Replacement (exam variant)

🧰 Tech Stack

• Language: Python 3

🚀 Getting Started

Prerequisites

• Python 3.x installed

Running a script

git clone https://github.com/nhnadim06/cse-406.git
cd cse-406
python FCFS.py

Most CPU/disk scheduling scripts will prompt you for input (number of processes, arrival/burst times, disk requests, head position, etc.) directly in the terminal. A few scripts (e.g. CScanDiskScheduling.py, Sjf.py) use hardcoded sample data inside the file — edit the values at the top of the script to test different cases.

📁 Project Structure

cse-406/
├── FCFS.py                    # CPU: First Come First Serve
├── SJF.py / Sjf.py            # CPU: Shortest Job First
├── PriorityScheduling.py      # CPU: Priority Scheduling
├── RoundRobin.py               # CPU: Round Robin
├── FCFS_DiskScheduling.py     # Disk: FCFS
├── SSTF_DiskScheduling.py     # Disk: SSTF
├── CScanDiskScheduling.py     # Disk: C-SCAN
├── scandiskscheduling.py      # Disk: SCAN
├── FIFOPageReplacement.py     # Page Replacement: FIFO
└── FIFO(final_exam).py        # Page Replacement: FIFO (exam variant)

📄 License

This project currently has no license specified.

📬 Contact

Maintainer: nhnadim06