#React

Create a custom React hook, `useFetch`, that handles data fetching and error management.

Explain how you would implement error handling in a React application. Provide examples.

What is reconciliation in React? Explain how React determines what to render efficiently.

Discuss the differences between Virtual DOM and Real DOM in React. Why is the Virtual DOM faster?

Design a system of concurrent progress bars that handle multiple tasks running in parallel. Implement features for starting, pausing, and resetting actions, ensuring independent states for each progress bar. Use simulated asynchronous tasks like setInterval or Promises.