Explain what is the role of sub-directory app/controllers and app/helpers?

Role of app/controllers and app/helpers directories in Ruby on Rails

In a Ruby on Rails application, the app/controllers and app/helpers directories play crucial roles in handling user requests and providing helper methods to enhance the functionality of your application.

app/controllers directory

The app/controllers directory is where you define your application's controllers. Controllers are responsible for handling incoming HTTP requests, processing the request data, interacting with models (if needed), and rendering the appropriate views or redirecting to other actions.

The main responsibilities of controllers include:

1. Receiving requests: Controllers receive requests from the web server and determine which action to execute based on the URL and HTTP method.

2. Processing data: Controllers process data submitted through forms or other means, such as parameters passed in the URL or request body.

3. Interacting with models: Controllers interact with models to retrieve, create, update, or delete data in the database.

4. Rendering views: Controllers render the appropriate views to generate the response that will be sent back to the client.

5. Handling errors: Controllers handle errors that occur during the request processing and...