Next.js Interview Questions and Answers
Experienced / Expert level questions & answers
Ques 1. Explain how to handle dynamic routes in Next.js.
Dynamic routes in Next.js are defined using square brackets in the file name, like '[id].js'. You can use the 'getStaticPaths' and 'getStaticProps' functions to fetch data for dynamic routes.
Ques 2. Explain the concept of 'incremental static regeneration' (ISR) in Next.js.
Incremental Static Regeneration is a feature in Next.js that allows you to update static content without rebuilding the entire site. It enables dynamic content updates at runtime.
Ques 3. How can you handle authentication in a Next.js application?
Authentication in Next.js can be handled using various methods such as third-party providers like Auth0, custom authentication APIs, or middleware like 'next-auth'.
Ques 4. How can you configure a custom server in Next.js?
You can configure a custom server in Next.js by creating a 'server.js' file in your project. However, using a custom server is discouraged in most cases, and it may bypass some optimizations.
Ques 5. Explain the purpose of the 'getStaticPaths' function in dynamic routes.
'getStaticPaths' is used in dynamic routes to specify which paths should be pre-rendered at build time. It returns an array of possible values for the dynamic segments in the route.
Ques 6. Explain the concept of 'API middleware' in Next.js.
API middleware in Next.js allows you to intercept and modify API requests and responses. It can be useful for tasks like authentication checks or request logging.
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