What order operation is available in the My Account section in the storefront?
You have created a custom module which must perform an action immediately after an order is placed, but only on the store front of the merchant site. You have selected the checkout_submit_all_after as the target event which the module will observe.
In which file will the event observer be declared?
Your module adds a new controller class which will return a JSON response.
What will be the return type of the execute method?
A merchant tasks you to keep sales managers out of the system configuration backend pages.
How do you do that using the admin interface?
You want to remove a column introduced by a third-party extension via declarative schema.
How do you do that?
In a code review of a merchant’s site you have discovered that there are multiple observers for the checkout_submit_all_after event. After closer inspection, you notice one of these observers is relying on the others being executed before it is called.
What risk does this pose, and how can it be mitigated?
You are developing a module and need to add another column to a table introduced by another module MyCompany_MyModule via db schema.
How do you do that?