Node.js API Masterclass with Express and MongoDB - Intro to Middleware

The video tutorial introduces middleware in Express and Mongoose, explaining its role in the request-response cycle. It demonstrates creating a simple logging middleware, integrating it with routes, and accessing request variables. The tutorial also covers refactoring middleware code for better organization and introduces Morgan, a third-party logging tool, for enhanced logging in development environments.

What is the primary role of middleware in Express?

• To handle database connections

• To manage user authentication

• To access and modify the request-response cycle

• To render HTML pages

In the context of middleware, what does the 'next' function do?

• It stops the server

• It moves to the next middleware in the cycle

• It logs the request details

• It sends a response to the client

How can you access a variable set in middleware within a route?

• By accessing the response object

• By using a global variable

• By accessing the request object

• By using a session variable

What is the purpose of creating a custom logging middleware?

• To manage database connections

• To render HTML pages

• To handle user authentication

• To log request methods and URLs

Where should middleware functions ideally be placed in an Express project?

• In a separate middleware folder

• In the public directory

• In the routes folder

• In the server.js file

What is Morgan used for in an Express application?

• To render views

• To manage user sessions

• To log HTTP requests

• To connect to a database

How can you conditionally use middleware based on the environment in Express?

• By using a configuration file

• By checking the request method

• By using a command-line argument

• By checking the NODE_ENV variable

What is the benefit of using Postman collections?

• To compile JavaScript code

• To store HTML templates

• To manage database schemas

• To organize and save API requests

Why is it important to save API requests in Postman?

• To improve server performance

• To enhance security

• To create documentation later

• To reduce code complexity

What feature of Postman allows you to create a specific environment for requests?

• Headers

• Environments

• Variables

• Collections