ReactJS Scenario-Based Questions

1. You are tasked with optimizing a React application that is experiencing significant performance issues. What steps would you take to identify and resolve the bottlenecks?

2. A client is requesting a feature that requires real-time updates to the UI when data changes. How would you implement this using React and what considerations would you take into account for performance and user experience?

3. Your team has been using class components, but management wants to shift to functional components with hooks. How would you approach this transition for existing components while minimizing disruptions?

4. A user reports a bug that only occurs in Internet Explorer. How would you go about debugging the issue, and what strategies would you employ to ensure cross-browser compatibility in your React application?

5. You are building a large-scale application that requires global state management. What options would you consider, and how would you decide which one to implement?

6. Your application has numerous components that need to share state and methods. How would you design the application to ensure clean code and maintainability while leveraging React's capabilities?

7. A stakeholder demands that a new feature be implemented immediately, but it's not aligned with the current architecture of the application. How would you handle this request while balancing technical feasibility and business needs?

8. You notice that the team is not following best practices when it comes to testing React components. How would you approach changing this culture and implementing a testing strategy that ensures quality delivery?

9. You are developing a React Native application that must access device-specific functionalities such as the camera and geolocation. How would you handle permissions and ensure a smooth user experience across different platforms?

10. You are faced with a challenging performance issue where, on specific devices, the app becomes sluggish due to multiple re-renders. How would you diagnose the problem, and what solutions would you implement?