Perfect 🚀 You already have one advanced exam-style project (E-commerce API with JWT, RBAC, file upload, pagination, Socket.IO).
Now, let’s define another advanced-level practical definition that covers different advanced Node.js concepts — so you get practice across the full spectrum.

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🔥 Advanced Practical Definition #2 — Project: “Online Learning Platform (LMS)”

Duration: 2–3 hours practical exam
Focus: Authentication, Authorization, Payments, Microservices, WebSockets, Testing, Caching, Logging, Monitoring

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📌 Problem Statement

Build a mini Learning Management System (LMS) backend with these features:

1. Authentication & RBAC

• JWT-based login/register with refresh tokens.

• Roles: student, teacher, admin.

• Rules:

  • teacher can create courses.

  • student can enroll in courses.

  • admin can manage users + all courses.

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2. Courses & Enrollment APIs

• POST /courses (teacher only): create course with title, description, price.

• GET /courses (any user): list courses with pagination, search, filtering.

• POST /courses/:id/enroll (student only): enroll in course.

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3. Payments Integration (Stripe/Mock)

• On enroll, call a Payment Service (microservice).

• If payment succeeds → enroll student.

• If fails → return error.

• Mock with simple success/fail simulation if no Stripe key provided.

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4. Caching Layer (Redis)

• Cache GET /courses results for 1 minute.

• If new course is added, clear cache.

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5. WebSockets (Socket.IO)

• When a student enrolls → notify the teacher in real time:

  • "New student enrolled in your course: {studentName}"

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6. Background Jobs (Queue)

• After enrollment → send welcome email asynchronously (mocked via console.log).

• Use Bull / Agenda with Redis.

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7. API Gateway + Microservices (Optional if time)

• Split into 2 services:

  • User Service (auth, profile)

  • Course Service (courses, enrollments, payments)

• Use Express Gateway or a custom API gateway.

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8. Advanced Security

• Rate limiting per IP (100 requests/15 min).

• Helmet for headers.

• Input validation with Joi/Yup.

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9. Testing (Unit + Integration)

• Write Jest tests for:

  • Register/login flow.

  • Enroll API (success + failure).

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10. Monitoring & Logging

• Use Winston or Pino logger for structured logs.

• Add health check endpoint /health returning DB + Redis status.

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💡 Bonus Tasks (if extra time)

• GraphQL endpoint for querying courses + students.

• CI/CD with Docker + GitHub Actions.

• Swagger docs (/api-docs).

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🎯 Why this is Advanced?

Because it combines:

• JWT + Refresh tokens (auth lifecycle)

• Role-based access control

• Redis caching

• Socket.IO real-time

• Background jobs (async email)

• Payments integration (Stripe/mock microservice)

• Testing (Jest)

• Logging + monitoring

• Optional Microservices & API Gateway

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👉 This is the kind of exam top companies give for 2–3 hours practical test.
It touches nearly every advanced Node.js backend concept in one project.

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Would you like me to prepare the full project scaffold with code (like I did for the E-commerce one) so you can actually practice it end-to-end?