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WithoutBook LIVE Mock Interviews Express.js Related interview subjects: 19

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Ques 2

Explain routing in Express.js.

Routing refers to how an application’s endpoints (URIs) respond to client requests. In Express, you can define routes to handle different HTTP methods and URL patterns.
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Ques 8

What is the purpose of the Express.js 'app.listen()' method?

The 'app.listen()' method is used to bind and listen for connections on the specified host and port. It starts the Express.js application.
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Ques 9

Explain the difference between PUT and PATCH HTTP methods in the context of Express.js.

PUT is used to update or create a resource entirely, while PATCH is used to apply partial modifications to a resource.
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Ques 16

What is the purpose of the 'helmet' middleware in Express.js?

'helmet' is a middleware that helps secure Express.js applications by setting various HTTP headers to prevent common web vulnerabilities.
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Ques 20

Explain the purpose of the 'express.urlencoded()' middleware.

'express.urlencoded()' is a middleware that parses incoming requests with URL-encoded payloads and is based on the 'body-parser' library.
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