Learn OS concepts, processes, and memory management
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228
Sub Topics
674
MCQs
312
MCOs
505
True/False
302
Fill Blanks
105
Rearrange
268
Matching
145
Comprehensions
247
Flashcard Decks
Curriculum
What You'll Learn
01 Introduction to Operating Systems 3 topics
1 Operating System Concepts
- Definition and Purpose
- Evolution of Operating Systems
- Types of Operating Systems
2 Operating System Structure
- Kernel and User Space
- Monolithic vs Microkernel Architectures
- Layered Design Approach
3 System Calls and APIs
- Types of System Calls
- API Implementation
- System Call Interface
02 Computer System Architecture 3 topics
1 Computer System Components
- Hardware Components
- System Bus Architecture
- I/O Subsystems
2 Processor Management
- Instruction Execution Cycle
- Interrupts and Interrupt Handling
- Privileged and Non-privileged Instructions
3 Memory Hierarchy
- Cache Memory
- Main Memory
- Secondary Storage
03 Process Management 3 topics
1 Process Concepts
- Process vs Program
- Process States and Transitions
- Process Control Blocks
2 Process Scheduling
- Scheduling Criteria
- Scheduling Algorithms
- Real-time Scheduling
3 Inter-Process Communication
- Shared Memory Systems
- Message Passing Systems
- Client-Server Communication
04 Threads 3 topics
1 Thread Concepts
- Difference Between Processes and Threads
- User-level vs Kernel-level Threads
- Multithreading Models
2 Thread Management
- Thread Creation and Termination
- Thread Libraries (POSIX, Win32)
- Thread Pools
3 Thread Scheduling
- Thread Priority
- Contention Scope
- Threading Issues and Challenges
05 CPU Scheduling 3 topics
1 Scheduling Concepts
- CPU-I/O Burst Cycle
- Preemptive vs Non-preemptive Scheduling
- Dispatcher
2 Scheduling Algorithms
- First-Come, First-Served
- Shortest-Job-First
- Priority Scheduling
- Round Robin
- Multilevel Queue Scheduling
- Multilevel Feedback Queue
3 Algorithm Evaluation
- Deterministic Modeling
- Queueing Models
- Simulation
- Implementation
06 Process Synchronization 4 topics
1 Critical Section Problem
- Race Conditions
- Requirements for Solutions
- Hardware Support
2 Synchronization Tools
- Mutex Locks
- Semaphores
- Monitors
- Condition Variables
3 Classical Synchronization Problems
- Producer-Consumer Problem
- Readers-Writers Problem
- Dining Philosophers Problem
4 Deadlock and Starvation
- Deadlock Conditions
- Deadlock Prevention
- Deadlock Avoidance
07 Deadlocks 4 topics
1 Deadlock Characterization
- Necessary Conditions
- Resource Allocation Graph
- Deadlock Modeling
2 Deadlock Prevention
- Mutual Exclusion
- Hold and Wait
- No Preemption
- Circular Wait
3 Deadlock Avoidance
- Safe State
- Resource Allocation Graph Algorithm
- Banker's Algorithm
4 Deadlock Detection and Recovery
- Detection Algorithms
- Recovery Strategies
- Integrated Approaches
08 Memory Management 4 topics
1 Memory Management Concepts
- Address Space
- Memory Allocation
- Memory Mapping
2 Contiguous Memory Allocation
- Fixed Partitioning
- Variable Partitioning
- Fragmentation
3 Paging
- Basic Paging Mechanism
- Hardware Support
- Protection and Sharing
4 Segmentation
- Segmentation Architecture
- Hardware Support
- Comparison with Paging
09 Virtual Memory 4 topics
1 Virtual Memory Concepts
- Demand Paging
- Page Replacement
- Thrashing
2 Page Replacement Algorithms
- FIFO
- Optimal
- LRU
- Counting-Based Algorithms
- Page Buffering
3 Allocation of Frames
- Minimum Number of Frames
- Global vs Local Allocation
- Fixed vs Priority Allocation
4 Design Issues
- Page Size
- TLB Reach
- Inverted Page Tables
- Program Structure
10 File System Interface 4 topics
1 File Concepts
- File Attributes
- File Operations
- File Types
2 Directory Structure
- Single-Level Directory
- Two-Level Directory
- Tree-Structured Directories
- Acyclic and General Graph Directories
3 File System Mounting
- Mount Points
- Mounting Process
- Unmounting
4 Access Methods
- Sequential Access
- Direct Access
- Indexed Access
11 File System Implementation 4 topics
1 File System Structure
- Layered Architecture
- On-Disk Structures
- In-Memory Structures
2 File Allocation Methods
- Contiguous Allocation
- Linked Allocation
- Indexed Allocation
3 Free Space Management
- Bit Vector
- Linked List
- Grouping and Counting
4 Directory Implementation
- Linear List
- Hash Table
- B-Trees
12 Mass Storage Structure 4 topics
1 Disk Structure
- Disk Geometry
- Disk Attachment
- Disk Scheduling
2 Disk Scheduling Algorithms
- FCFS
- SSTF
- SCAN and C-SCAN
- LOOK and C-LOOK
3 Disk Management
- Disk Formatting
- Boot Block
- Bad Blocks
4 RAID Structure
- RAID Levels
- Performance and Reliability
- Software vs Hardware RAID
13 I/O Systems 4 topics
1 I/O Hardware
- I/O Devices
- Device Controllers
- Direct Memory Access
2 Application I/O Interface
- Block and Character Devices
- Network Devices
- Clocks and Timers
3 Kernel I/O Subsystem
- Scheduling
- Buffering
- Caching
- Spooling and Device Reservation
4 Transforming I/O Requests
- Device Drivers
- Interrupt Handlers
- Error Handling
14 Protection and Security 4 topics
1 Protection Concepts
- Goals of Protection
- Domain of Protection
- Access Matrix
2 Access Control
- Access Control Lists
- Capability Lists
- Role-Based Access Control
3 Security Concepts
- Security Threats
- Cryptography
- User Authentication
4 System Security
- Program Threats
- System Threats
- Network Threats
- Defense Mechanisms
15 Distributed Systems 4 topics
1 Distributed System Architecture
- System Models
- Network Structure
- Network Types
2 Distributed Communication
- Remote Procedure Calls
- Message Passing
- Remote Method Invocation
3 Distributed Synchronization
- Clock Synchronization
- Mutual Exclusion
- Election Algorithms
4 Distributed File Systems
- Distributed File System Structure
- NFS
- Andrew File System
16 Virtualization and Cloud Computing 4 topics
1 Virtualization Concepts
- Types of Virtualization
- Hypervisors
- Virtual Machine Monitors
2 Virtualization Techniques
- Full Virtualization
- Paravirtualization
- Hardware-assisted Virtualization
3 Cloud Computing
- Service Models (IaaS, PaaS, SaaS)
- Deployment Models
- Cloud Resource Management
4 Containerization
- Container Architecture
- Docker and Kubernetes
- Orchestration
17 Real-Time and Embedded Systems 3 topics
1 Real-Time Operating Systems
- Hard vs Soft Real-Time
- Real-Time Scheduling
- Priority Inversion
2 Embedded Systems
- Characteristics of Embedded OS
- Resource Constraints
- Power Management
3 Case Studies
- QNX
- VxWorks
- RTLinux
- Android
18 Operating System Design and Implementation 3 topics
1 Design Principles
- Policy vs Mechanism
- Orthogonality
- Design Trade-offs
2 Implementation Techniques
- Language Choice
- Coding Practices
- Testing and Debugging
3 Case Studies
- UNIX/Linux
- Windows
- macOS
- Android and iOS
19 Multiprocessor and Multicore Systems 3 topics
1 Multiprocessor System Architecture
- Symmetric Multiprocessing
- Asymmetric Multiprocessing
- NUMA Architecture
2 Multicore Processors
- Core Organization
- Memory and Cache Coherence
- Thread Scheduling
3 Parallel Programming
- Threading Models
- Synchronization Issues
- Performance Considerations
20 Future Trends in Operating Systems 3 topics
1 Emerging Technologies
- Quantum Computing
- Neuromorphic Computing
- Edge Computing
2 New Paradigms
- Serverless Computing
- Unikernels
- Microservices Architecture
3 Research Directions
- Energy-aware Computing
- Trusted Computing
- Self-healing Systems
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