Next.js/React Interview Questions Revealed
A developer has shared a list of technical questions from a recent frontend interview for a Next.js and React role at the company Scalong. The questions covered Next.js rendering methods like SSR, ISR, and SSG, core React hooks such as useState and useEffect, and fundamental JavaScript concepts including hoisting, closures, and promises.
- The developer who shared the questions, Ayush Dixit, is a MERN stack developer with over three years of experience building scalable web applications with Next.js, Node.js, and various cloud technologies. - Questions covering Next.js rendering methods (SSR, SSG, ISR) are standard for mid-level and senior roles, as they test a candidate's ability to make architectural decisions that directly impact SEO, performance, and infrastructure costs. - Core JavaScript concepts like closures and hoisting are frequently used as differentiators in interviews to gauge a candidate's fundamental understanding beyond framework-specific knowledge, which is crucial for debugging and writing efficient code. - The emphasis on React Hooks like `useState` and `useEffect` is typical, as interviewers expect candidates to manage state and side effects in functional components without relying on older class-based approaches. - The frontend job market in major European tech hubs like Berlin and Paris is highly competitive, with a median time to hire of around 31-32 days, reflecting a strong demand for engineers with these specific React and Next.js skills. - In Europe, TypeScript and React are among the most in-demand skills for frontend developers, making knowledge of the concepts tested in this interview a key requirement for companies looking to hire top talent. - For hiring managers, this question set serves as a template for assessing a candidate's practical ability to build modern, production-grade web applications, moving beyond basic algorithmic challenges to focus on real-world architectural patterns.
