React Interview Questions

Learn how to access and manipulate DOM elements in React using useRef or callback refs.

Understand how React hooks replace traditional class component lifecycle methods.

Understand the difference between controlled and uncontrolled components in React with clear examples.

Encapsulate reusable logic into custom hooks to simplify your React components.

Learn how Higher-Order Components (HOCs) enhance reusability by wrapping existing components with additional functionality.

Render modals or tooltips outside the main DOM hierarchy using React Portals.

Understand render props and Higher-Order Components (HOCs) and how they enable reusability in React.

Learn how to execute a parent function from a child component using callback props.

Understand how the Context API helps share global state across components and when Redux might be a better choice.

Use React Context API to share data globally between components without prop drilling.

Set default values for component props to ensure predictable behavior when no value is passed.

Capture user-selected radio button value and display it dynamically in another input field using useState.

Learn how to display user input dynamically in another element using useState and controlled components.

Control a child input element’s focus or disabled state from its parent component using useRef and state.

Learn how React uses synthetic events for cross-browser compatibility and how to bind event handlers in JSX.

Understand how to pass props from parent to child components in React using JSX attributes.

Learn how to prevent excessive prop passing in React using Context API or custom hooks.

Apply conditional CSS in React using inline styles, classNames, or libraries like clsx.

Learn how to display elements conditionally using if statements, ternary operators, and logical AND in React.

Learn how to render UI elements dynamically based on conditions using ternary and logical operators.