React JS Free Certification 2025

Earn a React JS Certificate from The Digital Adda and showcase it in the Certifications section of your LinkedIn profile, on your printed resume, CV, or other professional documents.

Looking to enhance your web development skills? The React JS Free Certification 2025 is your gateway to mastering one of the most in-demand JavaScript libraries for building modern, interactive web applications. Through practical lessons and real-world projects, you’ll gain the expertise to create dynamic user interfaces while earning a certification to showcase your skills. Start learning React JS today and take the next step in your career journey!

Exam Details:

• Format: Multiple Choice Question
• Questions: 10
• Passing Score: 8/10 or 80%
• Language: English

Here are the Questions and Answers:

Question 1: In which directory  React Components are saved?

• Inside js/components/
• /usr/bin/js
• Inside vendor/components/
• Inside vendor/

Question 2: Which of the following method is true about referring parent class in React.js?

• self()
• inherits()
• this()
• super()

Question 3: Which of the following function is true about changing the state in React.js?

• this.State{}
• this.setState
• this.setChangeState
• All of the above

Question 4: In React.js, how we can pass the data from one component to another in React.js?

• SetState
• Render with arguments
• Props
• PropTypes

Question 5: Which of the following is true regarding Babel?

• Compiler
• Transpilar
• Both of the above
• None of the above

Question 6: Which of the following is must for the API in React.js?

• SetinitialComponent
• RenderComponent
• Render
• All of the above

Question 7: Which of the following is a way to handle data in React.js?

• State & Props
• Services & Components
• State & Services
• State & Component

Question 8: Which of the following valid component return type of React?

• 2
• 5
• 3
• 1

Question 9: What is the default port number in which the application run?

• 80
• 443
• 3000
• 3669

Question 10: Which of the following command is used to create react-js-app?

• npx create-react-app appname
• npm install create-react-app
• npx install create-react-app -g
• install – l create-react-app

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