Register for our webinar

How to Nail your next Technical Interview

1 hour
Loading...
1
Enter details
2
Select webinar slot
*Invalid Name
*Invalid Name
By sharing your contact details, you agree to our privacy policy.
Step 1
Step 2
Congratulations!
You have registered for our webinar
check-mark
Oops! Something went wrong while submitting the form.
1
Enter details
2
Select webinar slot
*All webinar slots are in the Asia/Kolkata timezone
Step 1
Step 2
check-mark
Confirmed
You are scheduled with Interview Kickstart.
Redirecting...
Oops! Something went wrong while submitting the form.
close-icon
Iks white logo

You may be missing out on a 66.5% salary hike*

Nick Camilleri

Head of Career Skills Development & Coaching
*Based on past data of successful IK students
Iks white logo
Help us know you better!

How many years of coding experience do you have?

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Iks white logo

FREE course on 'Sorting Algorithms' by Omkar Deshpande (Stanford PhD, Head of Curriculum, IK)

Thank you! Please check your inbox for the course details.
Oops! Something went wrong while submitting the form.

Help us with your details

Oops! Something went wrong while submitting the form.
close-icon
Our June 2021 cohorts are filling up quickly. Join our free webinar to Uplevel your career
close
blog-hero-image

React JS MCQs for Aspiring Front-End Developers

by Interview Kickstart Team in Interview Questions
June 11, 2024

React JS MCQs for Aspiring Front-End Developers

Last updated by Naina Batra on Jun 11, 2024 at 09:43 AM | Reading time:

You can download a PDF version of  
Download PDF

Whether you’re a seasoned developer or just starting, preparing for a React JS interview can be daunting. That’s why we have curated the list of React JS interview questions to help you in your learning journey.

These interview questions are Multiple Choice Questions (MCQs) that cover a range of core concepts essential for understanding and working with React.

These interview questions include state management (eg. Internal state, setState method), props, hooks (eg. State and side effect management in functional components), higher-order components (HOCs), Redux, and more.

Additionally, the questions address understanding of controlled vs. uncontrolled components, serverless architecture benefits, and key features of React such as the virtual DOM, and declarative UI.

As an aspiring frond-end developer, you might already be leveraging online resources, coding boot camps, tutorials, and building personal projects. These MCQs can help you gauge your overall performance and identify areas needing improvement.

So, let’s just dive straight!

Also read: Advanced React JS Interview Questions

Popular React MCQs with Answers

To help you recall ReactJS basics, let’s now head towards MCQs. Explore the React interview questions and SPA framework questions for front-end development here

Q1. AngularJS is highly suited for

  1. MPA
  2. ZPA
  3. SPA
  4. DPA

Answer: c. SPA 

Q2. What do you interpret by state in React?

  1. External storage of compartment 
  2. Permanent storage
  3. Internal storage of compartment 
  4. All of the above 

Answer: c. Internal storage of compartment 

Q3. Which of the following directory stores the React Components?

  1. Inside components/js/
  2. Inside vendor/components 
  3. Inside js/components/
  4. Inside vendor/js/components/

Answer: c. Inside js/components/ 

Q4. Which among the following defined routes in a React application? 

  1. Route 
  2. Router
  3. Routed
  4. Routing 

Answer: a. Route

Q5. Choose the wrong statement about redux

  1. It offers state persistence 
  2. It easily passes between components 
  3. It is only used with React 
  4. It eases debugging and testing 

Answer: a. It offers state persistence

Q6. Which is the right command for creating a new React app? 

  1. npx create-react-app-g my-app
  2. npx create-new-react-app my-app
  3. npx create-react-app my-app
  4. Any of these can be used 

Answer: c. npx create-react-app my-app

Q7. Select the correct use of React hooks

  1. Style management in class components 
  2. Style management in functional components 
  3. State and side effect management in class components 
  4. State and side effect management in functional components 

Answer: d. State and side effect management in functional components 

Q8. Which type of updates to the component state is seen when using React? 

  1. Removal of complete component 
  2. Updation of complete component 
  3. Updation of a specific component 
  4. Addition of a new component

Answer: c. Updation of a specific component

Q9. Select the correct option depiction purpose of HOCs or Higher Order Components in React

  1. Management of component events 
  2. Management of component styles 
  3. Reuse of component logic 
  4. Data sharing between components

Answer: c. Reuse of component logic 

Q10. What are props in ReactJS?

  1. They are the functions in ReactJS
  2. They are the arguments passed into React components
  3. They return multiple values from the function 
  4. All of the above 

Answer: b. They are the arguments passed into React components

Q11. Which of the following allows accessing URL parameters from the React component? 

  1. By using the object props.route
  2. By using the object props.location 
  3. By using the object props.match.params
  4. By using the object props.params

Answer: c. By using the object props.match.params

Q12. Select the correct option describing the use of the ‘webpack’ command in ReactJS

  1. It is a module bundler 
  2. It runes React local development server 
  3. It is used to transpile all JavaScript into one file 
  4. All of the above 

Answer: a. It is a module bundler 

Q13. Which option states the correct information on the ‘key’ prop

  1. The ‘Key’ prop is among the HTML attributes 
  2. ‘Key’ prop identifies a newly added item in the list 
  3. The ‘Key’ prop compares the new item during the ‘diffing’ algorithm
  4. Both b and c 

Answer: d. Both b and c 

Q14. During the ReactJS Lifecycle method, static getDerivedSateFromProps(props, state) is called in which condition 

  1. On updating the state of the component 
  2. On creating a new component 
  3. Both a and b
  4. None of the above 

Answer: c. Both a and b 

Q15. Which of these functions updates the state in ReactJS?

  1. Through the componentDidUpdate lifecycle method 
  2. Via setState() method 
  3. Through the componentWillUpdate life cycle method 
  4. Via direct modification of the state object 

Answer: b. Via setState() method 

Q16. What are the components of React? 

  1. They are a set of variables defined in ReactJS
  2. They are HTML elements 
  3. They are independent and reusable codes that return HTML elements 
  4. Both a and b are correct

Answer: c. They are independent and reusable codes that return HTML elements 

Q17. How do you understand prop drilling? It is: 

  1. Concept of passing data inside the component itself 
  2. Concept of passing data between sibling components 
  3. Concept of passing data to required destination as states until data reaches the required destination 
  4. Concept of passing data through intermediate components as props until data reaches the required destination 

Answer: d. Concept of passing data through intermediate components as props until data reaches the required destination 

Q18. What is the benefit of serverless integration on React applications? 

  1. It adds authentication functionality 
  2. It speeds up component rendering 
  3. It optimized code splitting 
  4. It allows scalability and cost-effective hosting 

Answer: d. It allows scalability and cost-effective hosting 

Q19. How will you manage scaling up of the resources in serverless architecture

  1. Via physical hardware 
  2. Via load balancers 
  3. Automatically through the cloud provider 
  4. Manually by developer

Answer: c. Automatically through the cloud provider 

Q20. Which of these features can be enlisted as features of ReactJS?

  1. JSX to ease writing React components 
  2. Declarative UI for efficient readability and debugging 
  3. Flexibility and speed 
  4. Virtual DOM 
  5. All of the above 

Answer: e. All of the above 

Q21. Which of these parameters differentiates controlled and uncontrolled components? 

  1. Predictability 
  2. Component and quantity of control over the data 
  3. Form of storage of values 
  4. All of the above 

Answer: d. All of the above 

Q22. What is the role of JSX in React? 

  1. Eases working with props and state 
  2. Efficiently handles browser events 
  3. Offers the method to write HTML elements in JavaScript 
  4. Improves performance of the Virtual DOM 

Answer: c. Offers the method to write HTML elements in JavaScript 

Q23. Which functions change the state of the ReactJS component? 

  1. this.State{}
  2. this.setState
  3. this.setChangeState
  4. this.ChangeState

Answer: b. this.setState

Q24. Which of these can handle data in React? 

  1. State and component 
  2. Service and component 
  3. State and service 
  4. State and props 

Answer: d. State and props 

Q25. Which of the functions is not available in ReactDOM?

  1. ReactDOM.findDOMNode()
  2. ReactDOM.hydrate()
  3. ReactDOM.destroy()
  4. ReactDOM.create Portal()

Answer: c. ReactDOM.destroy()

Advance Your Front-end Development Journey with Interview Kickstart!

While MCQs are a great way to gauge your performance, having a dedicated program can help accelerate your interview preparation. Our Front-end engineering interview masterclass has been designed to help you crack those toughest front-end development challenges.

With in-depth coverage of data structures, algorithms, mock interviews, personalized coaching, and career skills development, you’ll have all the support and resources needed to excel and achieve your goals. Our course has been co-created by FAANG instructors so that you can leverage their expertise and excel in your career path.

FAQs: React JS MCQs

Why is React good for the front end? 
Yes, easy maintenance and flexibility make it good for the front end. 

Is React better than HTML?
React is preferred for dynamic and complex applications, while HTML is suited for static and simple websites. 

Should I use NodeJS with React? 
Yes, it is a widely recommended combination for creating modern web applications. 

Should I learn React without JavaScript?
No. Familiarity with JavaScript is critical to learning React. 

What is the difference between React and ReactJS? 
React or React Native is an open-source JavaScript framework used to develop mobile applications. ReactJS is open-source JavaScript that builds user interfaces for web applications. 

What is TypeScript vs React? 
TypeScript is a superset of JavaScript that allows developers to type annotations. React is the user interface library written in JavaScript. 

Related Articles: 

Author
Naina Batra
Manager, Content Marketing
The fast well prepared banner

Whether you’re a seasoned developer or just starting, preparing for a React JS interview can be daunting. That’s why we have curated the list of React JS interview questions to help you in your learning journey.

These interview questions are Multiple Choice Questions (MCQs) that cover a range of core concepts essential for understanding and working with React.

These interview questions include state management (eg. Internal state, setState method), props, hooks (eg. State and side effect management in functional components), higher-order components (HOCs), Redux, and more.

Additionally, the questions address understanding of controlled vs. uncontrolled components, serverless architecture benefits, and key features of React such as the virtual DOM, and declarative UI.

As an aspiring frond-end developer, you might already be leveraging online resources, coding boot camps, tutorials, and building personal projects. These MCQs can help you gauge your overall performance and identify areas needing improvement.

So, let’s just dive straight!

Also read: Advanced React JS Interview Questions

Popular React MCQs with Answers

To help you recall ReactJS basics, let’s now head towards MCQs. Explore the React interview questions and SPA framework questions for front-end development here

Q1. AngularJS is highly suited for

  1. MPA
  2. ZPA
  3. SPA
  4. DPA

Answer: c. SPA 

Q2. What do you interpret by state in React?

  1. External storage of compartment 
  2. Permanent storage
  3. Internal storage of compartment 
  4. All of the above 

Answer: c. Internal storage of compartment 

Q3. Which of the following directory stores the React Components?

  1. Inside components/js/
  2. Inside vendor/components 
  3. Inside js/components/
  4. Inside vendor/js/components/

Answer: c. Inside js/components/ 

Q4. Which among the following defined routes in a React application? 

  1. Route 
  2. Router
  3. Routed
  4. Routing 

Answer: a. Route

Q5. Choose the wrong statement about redux

  1. It offers state persistence 
  2. It easily passes between components 
  3. It is only used with React 
  4. It eases debugging and testing 

Answer: a. It offers state persistence

Q6. Which is the right command for creating a new React app? 

  1. npx create-react-app-g my-app
  2. npx create-new-react-app my-app
  3. npx create-react-app my-app
  4. Any of these can be used 

Answer: c. npx create-react-app my-app

Q7. Select the correct use of React hooks

  1. Style management in class components 
  2. Style management in functional components 
  3. State and side effect management in class components 
  4. State and side effect management in functional components 

Answer: d. State and side effect management in functional components 

Q8. Which type of updates to the component state is seen when using React? 

  1. Removal of complete component 
  2. Updation of complete component 
  3. Updation of a specific component 
  4. Addition of a new component

Answer: c. Updation of a specific component

Q9. Select the correct option depiction purpose of HOCs or Higher Order Components in React

  1. Management of component events 
  2. Management of component styles 
  3. Reuse of component logic 
  4. Data sharing between components

Answer: c. Reuse of component logic 

Q10. What are props in ReactJS?

  1. They are the functions in ReactJS
  2. They are the arguments passed into React components
  3. They return multiple values from the function 
  4. All of the above 

Answer: b. They are the arguments passed into React components

Q11. Which of the following allows accessing URL parameters from the React component? 

  1. By using the object props.route
  2. By using the object props.location 
  3. By using the object props.match.params
  4. By using the object props.params

Answer: c. By using the object props.match.params

Q12. Select the correct option describing the use of the ‘webpack’ command in ReactJS

  1. It is a module bundler 
  2. It runes React local development server 
  3. It is used to transpile all JavaScript into one file 
  4. All of the above 

Answer: a. It is a module bundler 

Q13. Which option states the correct information on the ‘key’ prop

  1. The ‘Key’ prop is among the HTML attributes 
  2. ‘Key’ prop identifies a newly added item in the list 
  3. The ‘Key’ prop compares the new item during the ‘diffing’ algorithm
  4. Both b and c 

Answer: d. Both b and c 

Q14. During the ReactJS Lifecycle method, static getDerivedSateFromProps(props, state) is called in which condition 

  1. On updating the state of the component 
  2. On creating a new component 
  3. Both a and b
  4. None of the above 

Answer: c. Both a and b 

Q15. Which of these functions updates the state in ReactJS?

  1. Through the componentDidUpdate lifecycle method 
  2. Via setState() method 
  3. Through the componentWillUpdate life cycle method 
  4. Via direct modification of the state object 

Answer: b. Via setState() method 

Q16. What are the components of React? 

  1. They are a set of variables defined in ReactJS
  2. They are HTML elements 
  3. They are independent and reusable codes that return HTML elements 
  4. Both a and b are correct

Answer: c. They are independent and reusable codes that return HTML elements 

Q17. How do you understand prop drilling? It is: 

  1. Concept of passing data inside the component itself 
  2. Concept of passing data between sibling components 
  3. Concept of passing data to required destination as states until data reaches the required destination 
  4. Concept of passing data through intermediate components as props until data reaches the required destination 

Answer: d. Concept of passing data through intermediate components as props until data reaches the required destination 

Q18. What is the benefit of serverless integration on React applications? 

  1. It adds authentication functionality 
  2. It speeds up component rendering 
  3. It optimized code splitting 
  4. It allows scalability and cost-effective hosting 

Answer: d. It allows scalability and cost-effective hosting 

Q19. How will you manage scaling up of the resources in serverless architecture

  1. Via physical hardware 
  2. Via load balancers 
  3. Automatically through the cloud provider 
  4. Manually by developer

Answer: c. Automatically through the cloud provider 

Q20. Which of these features can be enlisted as features of ReactJS?

  1. JSX to ease writing React components 
  2. Declarative UI for efficient readability and debugging 
  3. Flexibility and speed 
  4. Virtual DOM 
  5. All of the above 

Answer: e. All of the above 

Q21. Which of these parameters differentiates controlled and uncontrolled components? 

  1. Predictability 
  2. Component and quantity of control over the data 
  3. Form of storage of values 
  4. All of the above 

Answer: d. All of the above 

Q22. What is the role of JSX in React? 

  1. Eases working with props and state 
  2. Efficiently handles browser events 
  3. Offers the method to write HTML elements in JavaScript 
  4. Improves performance of the Virtual DOM 

Answer: c. Offers the method to write HTML elements in JavaScript 

Q23. Which functions change the state of the ReactJS component? 

  1. this.State{}
  2. this.setState
  3. this.setChangeState
  4. this.ChangeState

Answer: b. this.setState

Q24. Which of these can handle data in React? 

  1. State and component 
  2. Service and component 
  3. State and service 
  4. State and props 

Answer: d. State and props 

Q25. Which of the functions is not available in ReactDOM?

  1. ReactDOM.findDOMNode()
  2. ReactDOM.hydrate()
  3. ReactDOM.destroy()
  4. ReactDOM.create Portal()

Answer: c. ReactDOM.destroy()

Advance Your Front-end Development Journey with Interview Kickstart!

While MCQs are a great way to gauge your performance, having a dedicated program can help accelerate your interview preparation. Our Front-end engineering interview masterclass has been designed to help you crack those toughest front-end development challenges.

With in-depth coverage of data structures, algorithms, mock interviews, personalized coaching, and career skills development, you’ll have all the support and resources needed to excel and achieve your goals. Our course has been co-created by FAANG instructors so that you can leverage their expertise and excel in your career path.

FAQs: React JS MCQs

Why is React good for the front end? 
Yes, easy maintenance and flexibility make it good for the front end. 

Is React better than HTML?
React is preferred for dynamic and complex applications, while HTML is suited for static and simple websites. 

Should I use NodeJS with React? 
Yes, it is a widely recommended combination for creating modern web applications. 

Should I learn React without JavaScript?
No. Familiarity with JavaScript is critical to learning React. 

What is the difference between React and ReactJS? 
React or React Native is an open-source JavaScript framework used to develop mobile applications. ReactJS is open-source JavaScript that builds user interfaces for web applications. 

What is TypeScript vs React? 
TypeScript is a superset of JavaScript that allows developers to type annotations. React is the user interface library written in JavaScript. 

Related Articles: 

Recession-proof your Career

Attend our free webinar to amp up your career and get the salary you deserve.

Ryan-image
Hosted By
Ryan Valles
Founder, Interview Kickstart
blue tick
Accelerate your Interview prep with Tier-1 tech instructors
blue tick
360° courses that have helped 14,000+ tech professionals
blue tick
57% average salary hike received by alums in 2022
blue tick
100% money-back guarantee*
Register for Webinar

Recession-proof your Career

Attend our free webinar to amp up your career and get the salary you deserve.

Ryan-image
Hosted By
Ryan Valles
Founder, Interview Kickstart
blue tick
Accelerate your Interview prep with Tier-1 tech instructors
blue tick
360° courses that have helped 14,000+ tech professionals
blue tick
57% average salary hike received by alums in 2022
blue tick
100% money-back guarantee*
Register for Webinar

Attend our Free Webinar on How to Nail Your Next Technical Interview

Register for our webinar

How to Nail your next Technical Interview

1
Enter details
2
Select webinar slot
By sharing your contact details, you agree to our privacy policy.
Step 1
Step 2
Congratulations!
You have registered for our webinar
check-mark
Oops! Something went wrong while submitting the form.
1
Enter details
2
Select webinar slot
Step 1
Step 2
check-mark
Confirmed
You are scheduled with Interview Kickstart.
Redirecting...
Oops! Something went wrong while submitting the form.
All Blog Posts
entroll-image
closeAbout usWhy usInstructorsReviewsCostFAQContactBlogRegister for Webinar