In MERN Stack interview Process: A screening call to gauge experience with Express.js, React.js, MongoDB, and Node.js is usually part of the MERN stack developer interview process. Frontend (React, JavaScript, CSS), backend (Node.js, Express.js, MongoDB), and full-stack integration are all covered in technical exams. Project experience, problem-solving abilities, API design, and familiarity with best practices within the JavaScript ecosystem are the main areas of evaluation.