You are tasked with ensuring customers who log into the site are authorized. By default, this consists of
ensuring the customers email and password match the values in the database. On this project, you need to
verify additional data in this process.
Keeping in mind upgradeability, how is this done?

Magento 2's architecture uses code to bootstrap a custom module that resides in app/code.
What two files are required to make a module usable? (Choose two.)

Where do you change the frontName for the admin router?

You have been given the task of importing products from an external source. You decide to create a custom module to do this. The class handling the import creates a product for each record, sets the data on it and saves it to the database.
What do you inject into a constructor to represent each product you create?

During a code review of a module MyCompany_PaymentCurrencies you see a configuration field declared in the file etc/adminhtml/system.xml:

What is the consequence of the attribute showInStore being set to 0?