React Interview Question PDF By ScholarHat

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Top 50+ React Interview Question & Answers
React Interview Questions and Answers: An Overview
React interview questions an...

1. Describe What is React.
Facebook created the front-end JavaScript library React in 2011. It uses a component-based
meth...

React adheres to the MVC design pattern.
React increases eﬃciency by utilizing Virtual DOM.
It's simple to create dynamic ...

React uses components that combine both markup and logic, as opposed to dividing the
two technologies into different ﬁles....

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Read More - React Roadmap
Every react component needs to have a render() function. The HTML that should be displayed
in th...

12. What Do React Props Mean?
Properties are shortened to props in react. It is a built-in React object that functions sim...

13. In React, what is a State?
React components consist of states at their core. Data originates from states, which should...

4.
5.
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7.
8.
The child component has access to props. Child components are not allowed to
access the state.
Components
a...

Example:
React Interview Questions and Answers for
Intermediate
16. Deﬁne the differences between React's stateless and st...

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2.
3.
4.
5.
6.
Knowledge of past, present, and potential
future state changes is absent from it.
It may include informatio...

18. What does React deﬁne as an event?
Events in React are the responses that are set off by particular actions, such as k...

22. Describe Lists in React.
24. How are React forms created?
23. What use do keys provide in React?
21. How do controlled...

26. Deﬁne the lifecycle methods of React components.
The important React lifecycle methods are:
25. What stages does the l...

29. How does React's HOC work?
27. What do React's Pure Components mean?
The simplest and fastest components that can be w...

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Elements and components in react differ mostly in the following ways:
HOC can be used for a wide range of tasks, some of w...

Because fragments do not generate additional DOM nodes, they operate more quickly and
use less memory. Maintaining the int...

40. How do forms work in React?
38. What exactly are React hooks?
React state and lifecycle aspects can be "hooked into" f...

Developed on top of React, React Router is a robust routing library that facilitates the
addition of new screens and proce...

It's easy to use React Router's API.
Watch the Video - Learn Routing In React
React routing and conventional routing diffe...

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React application performance can be optimized by the following factors:
Using React's PureComponent or React.memo to avoi...

Minimizing the use of the global state and keeping components as stateless as possible.
React Portals provide a way to ren...

They are used for rendering elements like modals, tooltips, or dropdowns that need to
visually break out of the parent con...

Q1. How Can I Prepare for React Interview Questions?
Q2. Where Can I Find Resources for Learning More about React?
To prep...

Some advanced topics that might be helpful to learn in React include:
2. Context API: Learn how to use Context for state m...

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9. GraphQL: Understand how to fetch data with GraphQL and libraries like Apollo Client.
10. Advanced Component Patterns: H...

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