#Error Handling

What are the common exceptions encountered in ASP.NET applications, specifically discussing the FileNotFoundException? When does it typically occur?

Enhance an existing React component by adding error boundaries and managing loading states to improve user experience during API calls.

Write a function that attempts to call an API and returns a promise. The function should retry the API call a defined number of times if it fails, ensuring there are suitable delays between retries.

Provide examples to differentiate between checked and unchecked exceptions in Java.