You are writing a customization for the customer module. You need to make sure the configuration files from your module are loaded after the customer module's configuration.
Where should the dependency be declared?
You are reviewing a theme in app/design/frontend/MyCompany/MyTheme and see the file etc/view.xml.
What is the function of this file?
You need to find all orders in the processing state. You have written the code:

When you run the code, you get the following exception:

How do you resolve the exception?
In a custom module you are adding a new field to the store configuration. The field will set the value for the configuration path mycompany/mymodule/myoption.
How do you supply the default value for that configuration option?
You are working on a project that contains a million SKUs. The merchant has requested the product view page to have a custom color schema and page layout depending on the product price range.
How do you implement this, keeping simplicity in mind?
What is the difference between online and offline shipping methods?
You are setting up a brand new Magento installation for a merchant who is migrating from Magento 1 to Magento 2.
Keeping in mind upgradability and the need to customize, which one do you choose?
How do you add a foreign key to an existing table created by another module?