Recently I applied for a Senior Drupal Developer position in the United States.
I was asked to take an assessment on Drupal coding.
The test required that the developer select how to modify and add functionality to Drupal core in a custom module file. This is bad practice in Drupal since Drupal 7 was released many years ago.
Im becomming concerned that companies like this are spreading misinformation to their corporate clients and in general driving the quality of Drupal websites down.
Here is the test, and a synopsis of why this test question has no right answer.
The company who is administered and required the test was Pace Communications, and the software that was used for the test is created by a company named Vervo.
Here is the official documentation on Drupal that shows the correct method for declaring a new namespace in a custom module.
https://www.drupal.org/docs/develop/coding-standards/namespaces
Not much can be done about this except to raise awareness industry-wide about this bad practice.