A merchant asks you to extend customer functionality to allow customer accounts to be associated with two or more billing addresses. How is this implemented?
A module MyModule needs to send notifications to customers only when the account was modified from a mobile app using the REST web APIs. You decided to implement an observer for customer_save_after_data_object event. In which file do you declare the observer?
A module you are developing requires the addition of new routes that should be accessible in the store front. Where do you define your module's frontName?
The constructor function for \Magento\Catalog\Model\Category contains this excerpt: With the automatic dependency injection that Magento provides, how is the StoreManagerInterface resolved?