Some frequently asked questions by developers regarding errors in Node.js are:

1. What is a "SyntaxError: Unexpected token" error and how to fix it?

2. How to handle and debug "TypeError: Cannot read property '...' of undefined"?

3. How to fix "Error: ENOENT: no such file or directory"?

4. What is the "Error: listen EADDRINUSE: address already in use" error and how to resolve it?

5. What is a "RangeError: Maximum call stack size exceeded" error and how to debug it?

6. How to troubleshoot "Error: Cannot find module '...'" errors?

7. What is a "ReferenceError: ... is not defined" error and how to fix it?

8. How to resolve "Error: Connection refused" errors in Node.js?

9. What is an "Error: ETIMEDOUT" error and how to fix it?

10. How to handle "Error: EACCES: permission denied" errors in Node.js?

Note: The solutions for these errors can vary based on the context and the specific use case.