Typescript Interview Questions

Set fallback values for optional props using destructuring defaults in functional components and understand when to use defaultProps.

Pass any JavaScript value from parent to child as props, understand how props flow in React, and know what children can and cannot do with them.

PropTypes validate prop types and required props at runtime in development, logging console warnings on violations. In TypeScript projects, PropTypes are superseded by interface declarations and compile-time checking. Know what each serves: PropTypes = runtime dev warnings, TypeScript = compile-time safety.