➅ Explain the life cycle of a component.
➆ What is a life cycle method and what is its purpose?
➇ Give examples of some life cycle methods and their usage.

➎ States and Props

➀ What is a state?
➁ What is a prop?
➂ Difference between a state and a prop?
➃ What is a stateful component and a stateless component?

➄ How states are set in a class-based component?
➅ How states are set in a function-based component?
➆ How to define props in a class-based component?
➇ How to define props in a function-based component?
➈ Explain the behavior when a state's value is changed.

➏ Data Binding

➀ What is data binding?
➁ What are the different types of data binding?
➂ What kind of data binding does React allow?
➃ Which data is available for binding in React?

➐ Component Rendering

➀ What do you mean by rendering a component?
➁ Where to define rendering logic in a class-based component v/s function-based component?
➂ What may cause the rendering process slower?
➃ What is rerendering of a component and when does it happen?

➑ Introduction to Hooks

➀ What is a hook?
➁ Name the hooks which React provides out-of-the-box.
➂ What are the general conventions for naming a hook?
➃ From where can a React hook be called?
➄ Point out a few places where a hook can't be used.
➅ What is useState?

➆ Compare useState with the state management in class-based components.
➇ What is useEffect?
➈ Which life cycle methods are internally handled by useEffect?
➉ What is useRef?
➀➀ Give some scenarios where useRef should be used.

➀➁ Difference between useState and useRef.
➀➂ What is useContext?
➀➃ Explain how to manage contexts in components and how useContext fits in there.
➀➄ What is memoization and how does React achieve it?
➀➅ Explain the useMemo hook.

Reactjs interview Questions

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