You are adding an entry to the backend menu. To do so you open a core etc/adminhtml/menu.xml file as a reference. In the file you see the node:

What is the result of specifying resource="Magento_Catalog::catalog"?
How do you persist an entity to the database?
In the module located at app/code/MyCompany/MyModule there is a JS module in the file view/frontend/web/register.js. The Magento base URL is https://magento.host/ and the luma theme with the en_US locate is used.
What is the public URL for this file?
You have configured an event observer to watch the checkout_submit_all_after event using this XML:

What is the required class definition for the event observer?

While developing a module you need to modify an existing Data Patch.
How can you force Magento to execute an existing Data Patch file again?
What are two functions of a resource model? (Choose two.)
Where do you change the frontName for the admin router?
You are adding a new menu item to the admin backend which will link to a custom backend page.
The declaration of the route:

What do you specify as the menu item action attribute value so it links to /admin/mycompany/mymodule/?