Magento Related Exams
Magento-2-Certified-Associate-Developer Exam
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?
You have created a new section in system configuration under the Catalog tab:

How do you restrict an access to the section using Magento ACL?

What will be the result of calling the save() method on a collection instance?