Express.js Interview Questions and Answers
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Ques 1. What is Express.js?
Express.js is a web application framework for Node.js designed for building web applications and APIs.
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Ques 2. How to install Express.js?
You can install Express.js using npm (Node Package Manager) by running 'npm install express'.
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Ques 3. What is middleware in Express.js?
Middleware functions are functions that have access to the request, response, and the next function in the application’s request-response cycle.
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Ques 4. 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 5. What is the purpose of app.use() in Express.js?
app.use() is used to mount middleware functions in the application. It is executed every time a request is received.
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