Node.js Mastery Challenge

What is the primary benefit of asynchronous programming in Node.js?

• Reduced memory usage by blocking operations.

• Synchronous execution of tasks for better control.

• Improved performance and scalability through non-blocking operations.

• Increased complexity in code management.

Which method is used to create a new module in Node.js?

• Creating a new HTML file for the module

• Defining a module in a JSON configuration file

• Creating a new JavaScript file and using 'module.exports' or 'exports'.

• Using 'require' to import existing modules

What is the purpose of the 'express' module in Node.js?

• The 'express' module is primarily for handling file uploads in Node.js.

• The 'express' module is used for database management in Node.js.

• The 'express' module is a tool for creating desktop applications.

• The 'express' module is used to build web applications and APIs in Node.js.

Which HTTP method is typically used to retrieve data in a RESTful API?

• DELETE

• GET

• POST

• PUT

How do you handle errors in a Node.js application?

• Use try-catch for synchronous code, error-first callbacks or Promises for async code, and middleware for global error handling in Express.

• Always restart the server on error

• Use console.log to debug errors only

• Ignore errors and continue execution

Which database is commonly used with Node.js for NoSQL solutions?

• PostgreSQL

• MongoDB

• SQLite

• MySQL

What does the 'async' keyword signify in a function?

• It signifies that the function is asynchronous.

• It allows the function to return a promise immediately.

• It indicates that the function is synchronous.

• It is used to define a constant function.

How can you export a function from a Node.js module?

• module.exports = functionName; or exports.functionName = function() {}

• module.export(functionName)

• exports: functionName = function() {}

• functionName.export = function() {}

What is middleware in the context of Express.js?

• Middleware is a type of database in Express.js.

• Middleware is a built-in server in Express.js.

• Middleware is a framework for building front-end applications in Express.js.

• Middleware in Express.js is a function that processes requests and responses in the application.

What status code is returned for a successful HTTP POST request?

• 500

• 404

• 201

• 200