You have loaded an instance of Magento\Catalog\Model\Product in the $product variable. You know that the loaded product has the type configurable with four variations. These variations have the prices: $10, $12, $12,
$15.
What will be the result of the $product->getFinalPrice() call?

You see this code in etc/adminhtml/routes.xml:
<route id="mymodule" frontName="user-subscriptions">
<module name="MyCompany_MyModule" />
</route> You have placed a controller in Controller/Index/Subscribe.php.
If you want to create layout XML instructions for this controller, what would be the layout XML's filename?

You are implementing a customization of the sales management within a module MyCompany_MySalesProcess. You have created several event observers to add the custom functionality.
Each observer is a separate class, but they require some common functionality. How do you implement the common functionality in the event observers, keeping maintainability and testability in mind?

A merchant gives you the module MyCompany_MyModule to install.
How do you identify which REST endpoints are supported by the module?

Assume that a customer's cart only includes one downloadable product.
What effect will it cause on the quote object?