express questions

What is Express.js

Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.

What type of web application can built using Express.js?

you can build single-page, multi-page, and hybrid web applications, as well as RestFUL APIs.

What are core features of Express framework?

• It allows middleware set up to respond HTTP Requests

• It defines routing table which is used to achieve action based on HTTP Method and URL.

• It allows dynamically generate the HTML Pages based on passing arguments to the templates.

• It follows MVC architecture for web application.

What is middleware in Express.js?

Middleware is a function that accesses the request object (req), response object (res), and access next middleware function in application's request-response cycle. The next middleware function is represented by variable called 'next'.

What is 'next' in Express.js?

'next' is a parameter which is passed in middleware function to pass control to next middleware or handler.

What is routing?

Routing define how an application responds over client request to a particular endpoint (URI). Endpoint is specially a path and any one of HTTP request methods (GET, POST, etc).

app.METHOD(PATH,HANDLER)