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✅ Master Level
Operating Systems Fundamentals
Complete Beginner → Advanced Syllabus (Pin-to-Pin)
🟢 LEVEL 1
OS Basics
Introduction to Operating Systems and foundational concepts.
1. Introduction to Operating Systems
- What is an Operating System
- Goals of OS
- Functions of OS
- Kernel vs User space
- System calls
- Types of OS:
- Batch OS
- Time-sharing OS
- Distributed OS
- Network OS
- Real-time OS
🟢 LEVEL 2
OS Architecture
Understanding how Operating Systems are designed and structured.
2. OS Structure
- Monolithic Kernel
- Microkernel
- Hybrid Kernel
- Modular OS
- Layered Architecture
3. System Boot Process
- BIOS / UEFI
- Bootloader
- Kernel loading
- Init process
🟡 LEVEL 3
Process Management
Managing execution units and CPU allocation.
4. Processes
- Process vs Program
- Process Control Block (PCB)
- Process states
- Process lifecycle
5. Threads
- User-level threads
- Kernel-level threads
- Multithreading models
- Context switching
6. CPU Scheduling
- Scheduling criteria
- Preemptive vs Non-preemptive
- Algorithms:
- FCFS
- SJF
- Priority
- Round Robin
- Multilevel Queue
- Multilevel Feedback Queue
🟡 LEVEL 4
Process Synchronization
Coordinating concurrent processes safely.
7. Concurrency
- Race condition
- Critical section
- Mutual exclusion
8. Synchronization Tools
- Mutex
- Semaphore
- Monitor
- Spinlock
- Condition variables
9. Classical Problems
- Producer–Consumer
- Dining Philosophers
- Readers–Writers
🟠 LEVEL 5
Inter-Process Communication (IPC)
Mechanisms for processes to communicate and share data.
10. IPC Mechanisms
- Shared memory
- Message passing
- Pipes
- Named pipes
- Sockets
- Signals
🟠 LEVEL 6
Deadlocks
Understanding and handling system deadlocks.
11. Deadlock Concepts
- Necessary conditions
- Resource allocation graph
12. Deadlock Handling
- Prevention
- Avoidance (Banker's Algorithm)
- Detection
- Recovery
🔵 LEVEL 7
Memory Management
How OS allocates and manages system memory.
13. Memory Basics
- Logical vs Physical address
- Address binding
- Memory protection
14. Paging
- Page table
- Multi-level paging
- TLB
15. Segmentation
- Segment table
- Segment vs Paging
16. Virtual Memory
- Demand paging
- Page faults
- Page replacement algorithms:
🔵 LEVEL 8
File Systems
How OS organizes and manages stored data.
17. File System Concepts
- File attributes
- File operations
- Directory structure
18. File Allocation Methods
- Contiguous
- Linked
- Indexed
19. Disk Management
🔴 LEVEL 9
I/O Systems
Managing input/output operations and devices.
20. I/O Hardware
- Interrupts
- DMA (Direct Memory Access)
21. I/O Software
- Device drivers
- Buffering
- Caching
- Spooling
🔴 LEVEL 10
Security & Protection
Protecting system resources and ensuring isolation.
22. Protection Mechanisms
- Access control
- Authentication
- Authorization
- Privilege levels
23. OS Security Concepts
- Kernel security
- Sandboxing
- Process isolation
🔴 LEVEL 11
Virtualization & Modern OS
Modern OS concepts for cloud and containerized environments.
24. Virtualization
- Hypervisors (Type 1 & Type 2)
- Containers vs VMs
- Namespaces
- cgroups
25. Distributed Systems Basics
- Distributed OS
- Fault tolerance
- Consensus basics
💡 For Software / Frontend Engineers (Must-Know Focus)
If you're aiming for Senior Engineer level, focus deeply on:
- Processes & threads
- Concurrency & synchronization
- Deadlocks
- Memory management
- Context switching
- System calls
- Containers & namespaces
- File systems basics