17 Questions
What is the purpose of routing in Express?
To handle different requests and direct them to the appropriate pages
Why does the CSS style not work when accessing 'Localhost:8080/home' after adding it to the home.html file?
The CSS file is not linked properly in the HTML file
What does Express provide out of the box for building server-side applications?
Basic web server features
How can middleware functions in Express affect the request-response cycle?
Execute any code, make changes to request and response objects, and call the next middleware function
What folder should contain all HTML files when creating views in Express?
views folder
Which term best describes Express as a web framework for Node.js?
Fast
Which function in Express is used for routing requests?
get()
What is middleware in Express?
A function that modifies the request and response objects
Which function in Express is used for creating views?
render()
What is sophisticated routing in Express?
Routing requests based on URL parameters
Which of the following is not a performance optimization technique in Express?
Using synchronous functions
What feature of Express allows for efficient handling of high traffic applications?
Its minimal design for performance
Which of the following tasks can middleware functions in Express not perform?
Creating views
How does Express support sophisticated URL-based routing?
By providing an intuitive API for managing different HTTP routes
What is the main benefit of Express's flexibility?
It allows for integration with various database systems and templating engines
What does Express not facilitate?
Use of a specific ORM or templating engine
What is a middleware function in Express?
A function that has access to the request object, the response object, and the next middleware function
Study Notes
Node.js and Express
- Node.js is a platform for building server-side applications.
- Express is a fast, unopinionated, and minimalist web framework for Node.js.
- Express simplifies the process of building server-side applications with Node.js.
Routing
- Routing in Node.js refers to the process of determining how an application responds to a client request to a particular endpoint or URL.
- Express provides a sophisticated routing mechanism that allows managing different HTTP routes via a simple and intuitive API.
- Routing is used to handle every request, and every page must be handled in routing.
HTTP Module
- The http module is a core module in Node.js that allows creating HTTP servers and making HTTP requests.
- The http module is used to create a server using
http.createServer(). - The
listen()method is used to specify the port number on which the server will listen.
Request and Response Objects
- The
reqobject represents the HTTP request. - The
resobject represents the HTTP response. - Middleware functions can access the
reqandresobjects and the next middleware function in the application's request-response cycle.
Middleware
- Middleware functions are functions that have access to the
req,res, and next middleware function in the application's request-response cycle. - Middleware functions can perform tasks such as modifying the
reqandresobjects, ending the request-response cycle, calling the next middleware function in the stack, etc. - Middleware functions can be used to perform tasks such as logging, parsing request data, authentication, error handling, etc.
Creating a Server with Express
- To create a server with Express, you need to require the Express module, create an
appobject, and specify a port number. - You can use the
app.get()method to handle GET requests and theapp.listen()method to start the server.
Test your knowledge on Express.js routing mechanism, HTTP method-based routing, performance optimization, and flexibility in ORM usage. Learn how Express facilitates efficient request handling and response sending for high traffic applications.
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