Coding Interview Resources

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_**Operating System RoadMap** | |-- Kernel | |-- Memory Management | | |-- Paging | | |-- Segmentation | | |-- Virtual Memory | | | |-- Process Management | | |-- Process Scheduling | | |-- Inter-Process Communication (IPC) | | |-- Threads | | | |-- File System | | |-- File I/O | | |-- Directory Structure | | |-- File Permissions | | | |-- Device Drivers | | |-- Communication with Hardware | | |-- Input/Output (I/O) | | | |-- System Calls | |-- Interface to Kernel Functionality | |-- Examples: open(), read(), write(), etc. | |-- Memory Management | |-- RAM | | |-- Stack | | |-- Heap | | |-- Data Segment | | |-- Code Segment | | | |-- Cache | | |-- L1, L2, L3 Caches | | | |-- Virtual Memory | |-- Page Table | |-- Page Replacement Algorithms | |-- Swapping | |-- File System | |-- File Organization | |-- File Allocation Table (FAT) | |-- Inodes | |-- File Access Methods | |-- Networking | |-- TCP/IP | |-- Protocols | |-- Network Stack | |-- Routing | |-- Firewalls | |-- Security | |-- Authentication | |-- Authorization | |-- Encryption | |-- Access Control Lists (ACL) | |-- Process Management | |-- PCB (Process Control Block) | |-- Context Switching | |-- Deadlocks | |-- Synchronization | |-- Mutual Exclusion | |-- Device Management | |-- I/O Buffering | |-- Device Controllers | |-- Interrupt Handling | |-- DMA (Direct Memory Access) | |-- User Interface | |-- Graphical User Interface (GUI) | |-- Command Line Interface (CLI) | |-- Windowing Systems | |-- Shell | |-- Command Interpreter | |-- Scripting | |-- Job Control | |-- System Utilities | |-- Task Manager | |-- Disk Cleanup | |-- System Monitor | |-- Backup and Restore | |-- Boot Process | |-- BIOS/UEFI | |-- Boot Loader | |-- Kernel Initialization | |-- Init Process | |-- System Libraries | |-- Standard C Library | |-- POSIX Library | |-- WinAPI (for Windows) | |-- System Calls | |-- File System Calls | |-- Process Control Calls | |-- Memory Management Calls | |-- Communication Calls | |-- Error Handling | |-- Error Codes | |-- Logging | |-- Recovery Strategies | |-- Distributed Systems | |-- Clustering | |-- Load Balancing | |-- Distributed File Systems | |-- Cloud Computing | |-- Virtualization | |-- Infrastructure as a Service (IaaS) | |-- Platform as a Service (PaaS) | |-- Software as a Service (SaaS) | └-- Comments |-- // Single-line comment └-- /* Multi-line comment */ *_Created By PH4N745M*_

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6 API Architectural designs You Must Know 1. REST 🌐 Representational State Transfer - REST is like a classic library where you request specific books and receive them as they are. It's simple and widely used for web APIs, like ordering a la carte from a menu 🍽. 2. GraphQL 🚀 GraphQL is like a customizable buffet 🍴 where you ask for exactly what you want and get a tailored plate. It allows clients to request only the data they need, reducing over-fetching. 3. SOAP 🧼 SOAP (Simple Object Access Protocol) is like sending a letter 💌 with detailed instructions, complete with a table of contents. It's more structured but can be heavier than REST or GraphQL. 4. gRPC 🚄: gRPC is like a high-speed train 🚄 for communication between services. It uses Protocol Buffers for efficient data exchange and supports streaming and bidirectional communication. 5. WebSockets 🌐💬 WebSockets are like real-time phone calls ☎️ for the web. They enable two-way communication, perfect for chat apps and live updates. 6. MQTT 📡 MQTT (Message Queuing Telemetry Transport) is like a radio broadcast 📻, designed for low-bandwidth, high-latency, or unreliable networks. Ideal for IoT devices and sensor data.