The React.js interview process usually begins with an initial screening to assess the candidate's general knowledge of React and related technologies. This might involve discussing their past projects, experience with React, and any specific areas of expertise. Next, technical assessments or code challenges are often provided to evaluate the candidate's coding skills and problem-solving abilities. These challenges might require them to build small React applications, solve algorithmic problems using React components, or demonstrate their understanding of React's core concepts. Candidates might also be asked about their experience with state management libraries like Redux or MobX, and their knowledge of other front-end technologies, such as JSX, CSS-in-JS, or various testing frameworks like Jest.