JavaScript and Node.js Fundamentals

JavaScript Fundamentals

• The primary function of the call stack in JavaScript is to manage the execution of function calls.

HTTP and APIs

• HTTP status code 200 indicates a successful request.
• The fetch API is used to send data in a POST request.
• Promises are preferred over callbacks in JavaScript because they simplify the code structure.

Node.js and Express.js

• The module.exports object is used to export functions and objects from a module in Node.js.
• In Express.js, the app.get() method is used to define a route that handles a GET request.
• Middleware in Express.js is used to add functionality to the request-response cycle.
• The express.static() method is used to serve static files in Express.js.

Database and Storage

• MongoDB is a NoSQL database that uses BSON format to represent documents.
• The insertOne() method is used to insert a document into a collection in MongoDB.
• Mongoose is used in Node.js applications to provide schema-based solutions for MongoDB.

API Testing and Security

• Postman (Hoppscotch) is a tool used to test APIs by sending HTTP requests and viewing responses.
• Axios is used in web applications to make HTTP requests.
• The bcrypt library is used in authentication to hash passwords securely.

Asynchronous Programming

• The await keyword in an asynchronous function in JavaScript pauses the execution of the function until a Promise is resolved.
• The fakeRequest function is used to simulate network requests for practice in the context of learning callbacks and Promises.

Test your knowledge of JavaScript and Node.js basics, including the call stack, HTTP status codes, and module exports.