Express.js Interview Questions and Answers
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Ques 11. 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 12. 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 13. How can you set up a route parameter in Express.js?
You can define a route parameter by using a colon (:) followed by the parameter name in the route definition. For example, '/users/:id'.
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Ques 14. What is middleware chaining in Express.js?
Middleware chaining is the process of calling multiple middleware functions in sequence for a specific route or globally using 'app.use()'.
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Ques 15. Explain the role of the 'static' middleware in Express.js.
The 'static' middleware is used to serve static files, such as images, CSS, and JavaScript files, from a specified directory.
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