Technology Classroom

Full stack blueprint: Frontend → Backend → Database → Infrastructure. Tech choices + production checklist.

Component, Virtual DOM, Hooks (useState/useEffect/useContext), lifecycle, and React ecosystem.

React framework for production. SSR, SSG, ISR, CSR, file routing, API routes compared.

Google cross-platform UI toolkit. One Dart codebase → iOS, Android, Web, Desktop.

JavaScript runtime on V8. Event loop, non-blocking I/O, Express, Fastify, NestJS for backend APIs.

SELECT, INSERT, UPDATE, JOIN, Index, Transaction (ACID). PostgreSQL vs MySQL vs SQLite.

Container platform — build once, run anywhere. Dockerfile, docker-compose, registry, Kubernetes.

Register & Login flow, JWT Token, bcrypt, OAuth, 2FA — roles: User / Frontend / API / DB

Cart → Checkout → Payment → Fulfillment → Delivery. Full 11-step flow with role breakdown.

Time slot locking, deposit, reminders, check-in. For clinics, salons, sports, restaurants.

Push (FCM/APNs), Email, SMS, LINE, In-App, Webhook — multi-channel routing & delivery tracking.

S3 / Cloudinary / GCS upload flow. MIME validation, virus scan, CDN URL, signed URLs.

WebSocket + Redis Pub/Sub architecture. Read receipts, typing indicator, group chat, offline push.

ETL → Redis Cache → Charts. KPI categories, RBAC access, real-time metrics, export CSV/PDF.

Auth middleware → Permission guard → Row-level security. Interactive permission matrix examples.

How does a server work? Why every website needs one

Website address, how DNS works, and pricing

Internet security, how SSL/TLS works

Native vs Web vs Hybrid App, iOS vs Android differences

Pricing, documents, and steps to publish on App Store and Google Play

What is a Payment Gateway? How PromptPay, Stripe, Omise work

SMTP, IMAP, POP3, sending automated emails with various services

ESP32, ESP8266, Arduino microcontroller boards and their uses

LAN WAN Router Switch, how data travels in a network

2.4GHz vs 5GHz wireless data transmission, WPA2, WPA3

BLE, Bluetooth 5.0, connecting nearby wireless devices