Operating System

I guard the critical section with strict rules. Only one may pass while the others wait patiently in line

• Semaphore

• Monitor

• Mutex

• Scheduler

You think I’m gone when I’m swapped out, but I can sneak back in when needed. I make room when memory’s tight

I break memory into frames and keep track with a table. I’m the magician behind your virtual tricks

• Segment table

• Page table

• Free List

• Stack Pointer

I decide who gets the CPU, how long, and when. I balance fairness with efficiency

• Dispatcher

• Interrupt Handler

• CPU Scheduler

• Semaphore

You’ll never see all of me, but I show you only what you need. I live in memory, but pretend to be bigger

I’m a fair judge who gives everyone a little time, but never plays favorites. If you miss your chance, you go to the end of the line

• First Come First Serve

• Priority Scheduling

• Round Robin Scheduling

• Multilevel Queue

We’re like secret passageways between two minds. We pass notes, not voices. Our tools? Pipes and queues

• Thread Pool

• Signal Handling

• Inter-Process Communication (IPC)

• Interrupt Handling

You ask me to open the gates, read the scrolls, write new tales, and even erase the past. I am the spell you cast on files

• File System Interface

• File Operations

• Directory Management

• Free Space Management

You call, I respond. I bring back the data or confirm the deed. Our bond is built into the kernel

• User API

• Process Calls

• System Calls

• Interrupts

We're many, but we act as one. We live together in memory, share things, and work in parallel