Most important React concepts for interviews

Описание: Mastering the most important React concepts is essential for excelling in frontend developer interviews. This includes having a strong understanding of React fundamentals such as components, props, and state, along with the ability to explain how the virtual DOM works and why React is efficient. You should be confident with React Hooks—like useState, useEffect, useMemo, useCallback, and custom hooks—as they are core to modern React development. Interviewers also expect knowledge of component lifecycle (both class-based and hook-based equivalents), rendering behavior, reconciliation, and handling side effects. State management techniques using Context API, Redux, or other libraries are commonly tested, along with performance optimization strategies such as memoization and lazy loading. Understanding advanced concepts like higher-order components, render props, controlled vs uncontrolled components, and code splitting can make your answers stand out. Overall, mastering these topics prepares you to solve real-world UI problems and demonstrate strong React expertise during technical interviews.