Node.js Fundamentals Practice Exam

Node.js is an open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript code outside of a web browser. It is built on Chrome's V8 JavaScript engine and uses an event-driven, non-blocking I/O model, making it lightweight and efficient for building scalable network applications. Node.js is commonly used for developing server-side applications, APIs, and microservices. It provides a rich library of modules, known as the Node Package Manager (npm), which simplifies the process of building and deploying web applications. Understanding Node.js fundamentals involves grasping concepts such as modules, events, streams, and asynchronous programming, which are essential for developing robust and efficient applications.

Why is Node.js Fundamentals important?

• Server-side Development: Node.js is commonly used for server-side development, allowing developers to create scalable and high-performance web applications.
• API Development: Node.js is often used to develop APIs (Application Programming Interfaces) due to its ability to handle a large number of simultaneous connections efficiently.
• Microservices Architecture: Node.js is well-suited for building microservices, which are small, independent services that work together to form a larger application.
• Real-time Applications: Node.js is ideal for developing real-time applications like chat applications and online gaming platforms due to its event-driven, non-blocking I/O model.
• Full-Stack Development: Understanding Node.js fundamentals is valuable for full-stack developers who work on both the front-end and back-end of web applications.
• NPM Ecosystem: Node.js comes with a rich ecosystem of npm packages that extend its functionality, making it easier for developers to add features to their applications.

Who should take the Node.js Fundamentals Exam?

• Node.js Developer
• Full-Stack Developer
• Web Developer
• Backend Developer
• API Developer
• Application Architect
• DevOps Engineer
• System Administrator

Skills Evaluated

The candidate taking the certification exam on Node.js Fundamentals is evaluated for the following skills:

• Understanding of Node.js basics, including its architecture, event loop, and asynchronous programming model.
• Ability to use npm (Node Package Manager) to manage dependencies and packages.
• Proficiency in using core Node.js modules for tasks such as file system operations, networking, and HTTP handling.
• Knowledge of how to create and manage servers and routes using frameworks like Express.js.
• Understanding of how to work with databases in Node.js using libraries like Mongoose or Sequelize.
• Ability to write clean, modular, and maintainable code in JavaScript.
• Familiarity with security best practices for Node.js applications.
• Skill in debugging and troubleshooting Node.js applications.
• Awareness of performance optimization techniques for Node.js applications.
• Understanding of basic concepts related to web development, such as RESTful APIs and HTTP protocols.
  

Node.js Fundamentals Certification Course Outline

1. Node.js Basics
1.1 Introduction to Node.js
1.2 Node.js architecture
1.3 Installing Node.js
1.4 Using the Node.js REPL (Read-Eval-Print Loop)

2. JavaScript Basics
2.1 Variables and data types
2.2 Operators
2.3 Control structures (if, else, switch)
2.4 Loops (for, while)

3. Node.js Modules
3.1 Introduction to modules
3.2 Creating and exporting modules
3.3 Using core modules
3.4 Using npm packages

4. Asynchronous Programming
4.1 Understanding callbacks
4.2 Using promises
4.3 Using async/await

5. File System Operations
5.1 Reading and writing files
5.2 Working with directories

6. Networking
6.1 Creating a basic HTTP server
6.2 Making HTTP requests

7. Express.js
7.1 Introduction to Express.js
7.2 Creating routes
7.3 Handling requests and responses
7.4 Middleware

8. Working with Databases
8.1 Introduction to databases
8.2 Using MongoDB with Node.js
8.3 Using MySQL with Node.js

9. Error Handling
9.1 Handling errors in Node.js
9.2 Using try/catch
9.3 Error-first callbacks

10. Debugging Node.js Applications
10.1 Using console.log
10.2 Using the Node.js debugger

11. Testing Node.js Applications
11.1 Introduction to testing
11.2 Using Mocha for testing
11.3 Writing unit tests

12. Performance Optimization
12.1 Understanding Node.js performance
12.2 Using profiling tools
12.3 Caching strategies

13. Deployment
13.1 Deploying Node.js applications
13.2 Using PM2 for process management
13.3 Hosting options (AWS, Heroku, etc.)

14. RESTful APIs
14.1 Introduction to RESTful APIs
14.2 Creating RESTful APIs with Express.js
14.3 Consuming RESTful APIs

15. Websockets
15.1 Introduction to Websockets
15.2 Implementing Websockets in Node.js

16. Authentication and Authorization
16.1 User authentication
16.2 Using JWT (JSON Web Tokens)
16.3 Role-based access control

17. Web Application Security
17.1 Securing web applications
17.2 Cross-site scripting (XSS) prevention
17.3 Cross-site request forgery (CSRF) prevention

18. Building CLI (Command Line Interface) Tools
18.1 Creating CLI tools with Node.js
18.2 Parsing command line arguments

19. Advanced Topics
19.1 Child processes
19.2 Streams
19.3 Event emitters