Custom Error Handling

The video tutorial covers error handling in Express applications, focusing on creating custom middleware to handle errors and return JSON responses instead of HTML. It explains middleware functions, their role in the request-response cycle, and how to implement custom error handlers for different status codes, including 404 errors. The tutorial also demonstrates refactoring error handlers into separate files for cleaner code organization. Finally, it discusses testing the error handlers and introduces the plan to integrate Redux for managing global state in the application.

What is the main issue with the error response from API products?

• It returns a plain text message.

• It returns an HTML file.

• It returns a binary file.

• It returns a JSON object.

What is middleware in the context of web development?

• A database management system.

• A server configuration tool.

• A function with access to the request-response cycle.

• A type of front-end framework.

What is the purpose of calling 'next' in middleware?

• To move to the next piece of middleware.

• To log the request details.

• To restart the request-response cycle.

• To terminate the server.

How does the custom error handler determine the status code?

• It always sets it to 404.

• It checks if the status code is 200 and changes it to 500 if necessary.

• It randomly assigns a status code.

• It sets it based on the request method.

When is the stack trace included in the JSON response?

• Never, it is not included.

• Always, regardless of the environment.

• Only in production mode.

• Only in development mode.

What is the status code for a 'not found' error?

• 401

• 404

• 200

• 500

Why is the error handling code moved to a separate file?

• To improve code readability and organization.

• To reduce the file size of server.js.

• To increase server performance.

• To comply with a specific coding standard.

What happens if a valid object ID is not found in the database?

• A 500 status code is returned.

• The server crashes.

• A 200 status code is returned.

• A 404 status code is returned with a 'product not found' message.

What is the default status code if none is set in the custom error handler?

• 200

• 401

• 404

• 500

What is the next step after setting up the custom error handler?

• Integrating a new database.

• Starting to work with Redux for global state management.

• Refactoring the front-end components.

• Deploying the application to production.