React.js, often simply called React, is a highly popular JavaScript library for building user interfaces. Developed and maintained by Facebook, React is renowned for its component-based architecture and the ability to efficiently update and render components when data changes. It is a foundational tool for developing modern web and mobile applications, allowing developers to create dynamic and interactive user interfaces with ease. React's vast ecosystem, including tools like React Native for mobile app development, makes it a top choice for frontend development and a key player in the world of web technologies.
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Practice Test
241. What is serverless computing in the context of web development?
A. A server-free approach to hosting websites
B. A method for building servers
C. A traditional hosting environment
D. A database management system
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Answer: A server-free approach to hosting websites
242. Which cloud service providers offer serverless computing platforms?
A. AWS Lambda and Azure Functions
B. React and Angular
C. Express and Django
D. MongoDB and PostgreSQL
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Answer: AWS Lambda and Azure Functions
243. How does serverless integration benefit React applications?
A. It allows for scalable, cost-effective hosting
B. It speeds up component rendering
C. It adds authentication functionality
D. It optimizes code splitting
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Answer: It allows for scalable, cost-effective hosting
244. What is AWS Lambda, and how is it commonly used with React?
A. A serverless compute service on AWS
B. A frontend JavaScript library
C. A database management system
D. A testing framework
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Answer: A serverless compute service on AWS
245. What is the purpose of the "serverless.yml" configuration file in a serverless application?
A. To define serverless functions and resources
B. To store API endpoints
C. To configure Webpack settings
D. To manage database connections
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Answer: To define serverless functions and resources
246. Which AWS service is often used in conjunction with AWS Lambda for building serverless APIs?
A. Amazon API Gateway
B. Amazon S3
C. Amazon RDS
D. Amazon EC2
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Answer: Amazon API Gateway
247. How do you deploy a serverless React application to AWS Lambda?
A. Using a deployment script
B. Manually copying files to Lambda
C. Creating a Docker container
D. Running a local development server
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Answer: Using a deployment script
248. What is the advantage of using a serverless authentication service like AWS Cognito in a React application?
A. It provides secure user authentication
B. It optimizes CSS styles
C. It manages serverless functions
D. It compiles TypeScript code
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Answer: It provides secure user authentication
249. In a serverless architecture, how is the scaling of resources typically managed?
A. Automatically by the cloud provider
B. Manually by the developer
C. Through physical hardware
D. Through a load balancer
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Answer: Automatically by the cloud provider
250. What is a common use case for serverless integration in a React application?
A. Building APIs and handling user authentication
B. Managing application state
C. Developing interactive UI components
D. Configuring Babel settings
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Answer: Building APIs and handling user authentication
