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Junior Frontend Developer Interview Questions

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13,303 junior frontend developer interview questions shared by candidates

How to listen for value changes in the input, since onchange doesn't work What are event bubbling and event capturing, and what is the difference between them. What is cross-origin resource sharing (CORS), and how to handle it What are throttling and debouncing, and how to implement them Website performance optimization (there are many articles online, but practical experience is important) Browser caching principles What happens when you enter a URL React lifecycle methods A question about the result of setState in React What are the differences between functional components and class components in React What is a render prop component (I've heard of it, but haven't used it much) What is the fiber in React (I've only heard of it) Several details about module separation Have you worked with Node.js, and what do you think of it What is the process of importing a module in Node.js What is HTTPS, and what is the principle behind it How does HTTPS ensure that certificates are trusted What are the differences between AMD and CMD, CommonJS, and ES Modules What is function currying What is virtual DOM, and how is it implemented What is DOM diff What are GET and POST requests How to perform CI and testing, and whether to use ESLint What is the purpose of the Accept header, and what to do if the server doesn't support it
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Frontend Engineer

Interviewed at Meituan

3.5★
Mar 26, 2023

How to listen for value changes in the input, since onchange doesn't work What are event bubbling and event capturing, and what is the difference between them. What is cross-origin resource sharing (CORS), and how to handle it What are throttling and debouncing, and how to implement them Website performance optimization (there are many articles online, but practical experience is important) Browser caching principles What happens when you enter a URL React lifecycle methods A question about the result of setState in React What are the differences between functional components and class components in React What is a render prop component (I've heard of it, but haven't used it much) What is the fiber in React (I've only heard of it) Several details about module separation Have you worked with Node.js, and what do you think of it What is the process of importing a module in Node.js What is HTTPS, and what is the principle behind it How does HTTPS ensure that certificates are trusted What are the differences between AMD and CMD, CommonJS, and ES Modules What is function currying What is virtual DOM, and how is it implemented What is DOM diff What are GET and POST requests How to perform CI and testing, and whether to use ESLint What is the purpose of the Accept header, and what to do if the server doesn't support it

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