Explanation
To ensure a notification is received when the query fails, the admin should add their email address in the automation "Runtime Error or Skipped Run Notification Settings". This setting allows the admin to specify an email address or a data extension to receive notifications when an automation encounters a runtime error or a skipped run. A runtime error occurs when an activity within an automation fails to execute, such as a query that has invalid syntax or references a non-existent data extension. A skipped run occurs when an automation is scheduled to run but does not run because the previous run is still in progress. The other options are incorrect because:
Install the Marketing Cloud App on phone to receive Push Messages. This option will not ensure a notification is received when the query fails, as the Marketing Cloud App does not support push notifications for automation errors or skipped runs. The Marketing Cloud App only supports push notifications for Journey Builder entry events and email sends.
Add their Email Address in the Query Activity Notifications Field. This option will not ensure a notification is received when the query fails, as the Query Activity Notifications Field only sends notifications when the query completes successfully. The notifications include information such as the number of records processed, added, updated, skipped, or failed.
Configure the "Event Notification Service" in Setup with their Email Address. This option will not ensure a notification is received when the query fails, as the Event Notification Service is a feature that allows external systems to subscribe to events that occur in Marketing Cloud, such as email sends, opens, clicks, bounces, and unsubscribes. The Event Notification Service does not support events related to automation errors or skipped runs.