Full-Stack Developer 面试题与答案
问题 36. What is the purpose of middleware in a Full-Stack development framework like Express.js?
Middleware functions in Express.js handle tasks such as authentication, logging, and error handling. They are executed in the request-response cycle before the final request handler.
问题 37. Explain the concept of a stateless protocol and provide an example.
A stateless protocol does not store information about the state of communication between requests. An example is HTTP, where each request is independent of previous requests.
问题 38. What is the purpose of a web server and how does it differ from an application server?
A web server handles HTTP requests, serving static content, while an application server executes application code, handling dynamic content and business logic.
问题 39. Explain the concept of idempotence in the context of web development.
An operation is idempotent if repeating it multiple times has the same result as a single execution. In HTTP, safe methods (GET) are idempotent, while unsafe methods (POST) may not be.
问题 40. What is the purpose of the async/await syntax in JavaScript?
Async/await is a syntax for working with asynchronous code in JavaScript, making it more readable and allowing developers to write asynchronous code that resembles synchronous code.
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