A module declares the route:

What is the layout handle of the storefront path /custom/feature/?

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"?

You have created a module with a custom ACL resource and want to restrict access to resources of your module.
Which three items are restricted based on ACL role permissions? (Choose three.)

You are building a report using complex SQL aggregations to locate the required data.
In what type of class do you put these SQL statements?

Assume that $collection is a new instance of a class that extends
Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection, and $ids is an array of ids.
How do you select a list of records from the database where the record ids are in the $ids list?