41. What is Express.js?
Answer:A web application framework for Node.js
42. Which core feature of Express.js simplifies the creation of web routes and handling of HTTP requests and responses?
43. What is middleware in Express.js?
Answer:A function that handles specific tasks during the request-response cycle
44. Which command is used to install Express.js in a Node.js project?
Answer:npm install express
45. How does Express.js handle routing for web applications?
Answer:By defining routes using HTTP verbs and route handlers
46. What is the purpose of the app.use() method in Express.js?
Answer:To specify middleware functions that should be executed for incoming requests
47. Which template engine is commonly used with Express.js for rendering dynamic views?
48. In Express.js, what is the purpose of the req and res objects in route handlers?
Answer:To represent the incoming request and the outgoing response, respectively
49. What is Express.js commonly used for in web development?
Answer:Building web applications, RESTful APIs, and server-side applications
50. What is the primary benefit of using Express.js for web development?
Answer:It provides a fast and minimalistic framework for building web applications with Node.js.
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