Frontend Framework Fundamentals Questions

Core knowledge of modern frontend frameworks including component architecture and composition, functional and class based components, props and state management, and separation of concerns. Understanding of lifecycle methods and hooks and when to use different patterns. Ability to implement conditional rendering, lists and keys, controlled and uncontrolled forms, and component communication patterns. Familiarity with local and global state management approaches, basic routing concepts, component testing, and common performance optimization techniques such as memoization and virtualization. Awareness of how frameworks such as React, Vue, and Angular differ from vanilla JavaScript and from each other, and ability to build components that follow framework best practices.