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Express.js 면접 질문과 답변

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Ques 26. Explain the concept of 'Promise' in the context of asynchronous operations in Express.js.

Promises in Express.js are used to handle asynchronous operations, providing a cleaner and more readable way to structure asynchronous code.

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Ques 27. What is the role of the 'express.json()' middleware?

'express.json()' is a middleware that parses incoming JSON requests, populating the 'req.body' property with the parsed data.

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Ques 28. Explain the purpose of the 'express.static()' middleware.

'express.static()' is a middleware that serves static files, such as images, CSS, and JavaScript files, from a specified directory.

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Ques 29. How can you handle query parameters in Express.js?

You can handle query parameters in Express.js using the 'req.query' object, which contains key-value pairs of the query parameters.

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Ques 30. 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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