In a TCS front-end developer interview, candidates can expect questions covering core web technologies like HTML, CSS, and JavaScript, focusing on concepts such as semantic HTML, the box model, responsive design, and JavaScript fundamentals like closures, hoisting, and ES6 features. React.js is often a major focus, with questions on components, hooks (useState, useEffect), virtual DOM, and state management techniques like Context API. Interviewers may also assess knowledge of build tools like Webpack and Babel. Practical coding problems such as array manipulation, debounce/throttle functions, or string operations are common, alongside behavioral questions to evaluate communication, teamwork, and problem-solving under pressure.