Infosys Certified React Architect
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Join Premium10 Infosys Certified React Architect practice questions with answers
Real Lex exam-pattern multiple-choice questions for the Infosys Certified React Architect certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
You are working on a Progressive Web App (PWA) where you have used "Service Worker". What could be the primary cause to use the same?
- ✓Caching resources and providing offline support.Correct
- BDisplaying pop-up notifications to users.
- CManaging user authentication and permissions.
- DHandling user interface layout and design.
- Question 2
A PWA includes several resource-intensive features, and Raymond is concerned about performance optimization. He wants to implement code splitting to reduce the initial load time and improve the user experience. Which statement accurately describes the concept of code splitting?
- ✓Code splitting involves compressing the entire codebase into a single file to reduce load times.Correct
- BCode splitting is a technique that involves dividing the application code into smaller chunks and loading them on-demand as the user navigates the app.
- CCode splitting refers to removing all unnecessary code from the application to minimize its footprint.
- DCode splitting focuses on optimizing server-side code to minimize database queries and enhance performance.
- Question 3
The lifecycle events of a Service Worker are
- ✓Register -> Install -> Activate -> FetchCorrect
- BInstall -> Register -> Activate -> Fetch
- CInstall -> Register -> Fetch -> Activate
- DRegister -> Install -> Fetch -> Activate
- Question 4
Which of the following option is INVALID with respect to utilizing bootstrap in React?
- ✓Styling a web application.Correct
- BCreating a responsive website.
- CSpeeding up the CSS development of the web application.
- DIdentifying the CSS related errors in the web application.
- Question 5
If a developer desires to write clear, error-free code right from the start. Which one of the following tools has to be used by the developer? (Select any 2)
- ✓ESLintCorrect
- BPrettier
- CFormatter
- DCleaner
- Question 6
You have to choose the React.js data visualization library to visualize large and complex datasets. The library should be enough flexible, slightly difficult to learn, provides lower-level API, gives more control over the DOM, and should have medium community support.
Which of the following data visualization libraries would be the best choice for your application?
- ✓HeatmapCorrect
- BRecharts
- CVictory
- DNivo
- Question 7
Which of the following option is the BEST choice to pass data from the parent component to the child component?
- ✓stateCorrect
- Bprops
- Croutes
- Daxios.post()
- Question 8
Which of the following options are VALID with respect to axios and fetch? (Select any 2)
- ✓Both are native JavaScript interface for making HTTP requests. They are built into modern browsers, no additional installation is required.Correct
- BBoth axios and fetch return promises.
- Caxios response is parsed, while the fetch response is unparsed.
- Daxios uses Observables, while fetch uses promises.
- Question 9
What is the main purpose of React-Hot-Reloader that is serving as a React build tool?
- ✓To manage and optimize the project’s codebase and assets.Correct
- BTo set up a development environment and speed up the development by maintaining the local and global store.
- CTo see the changes of React components in real-time without having to refresh the page.
- DAll of these
- Question 10
You are tasked with optimizing the build and deployment process of a large-scale React application. The development team experiences long build times, and deploying updates is a time-consuming process. What strategies and techniques would you consider streamlining the build and deployment workflow for this application?
- ✓Implement code splitting and lazy loading for reducing bundle size. Introduce a Continuous Integration/Continuous Deployment (CI/CD) pipeline with automated testing and deployment scripts.Correct
- BUtilize a serverless architecture to offload build and deployment tasks to cloud services, reducing the development team's workload.
- CUse traditional server hosting with load balancing for faster deployments and leverage a content delivery network (CDN) for faster content delivery to users.
- DReduce the number of dependencies, including third-party libraries, and switch to a less feature-rich but faster build tool.
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