ServiceNow CAD free question 10 / 10 · Domain 6: Managing Applications
An administrator wants to undo the changes of an update set that was committed to production. A colleague says deleting that update set will put things back. What does the documentation recommend?
- Delete it, since that also rolls back the committed changes and is quicker
- Either one, because deleting and backing out an update set do the same thing
- Back out the update set instead, as deleting an update set is a bad practice
- Neither one, because committed changes can only be put back by hand later
Show the answer and explanation
Answer: C
Why this is correct
The documentation states that deleting an update set is a bad practice. To revert a customization, back out the update set rather than deleting it. Back out is available for committed update sets: you can back out changes to existing records for any committed update set.
Why the other options are wrong
"Delete it, since that also rolls back the committed changes and is quicker" … Deleting is not the way to revert. The page says to back out the update set rather than delete it, and deleting update entries does not undo the updates.
"Either one, because deleting and backing out an update set do the same thing" … They are not the same. Backing out is the documented way to revert a customization, while deleting is called a bad practice.
"Neither one, because committed changes can only be put back by hand later" … Committed update sets can be backed out. You can back out changes to existing records for any committed update set.
When deleting is allowed, and what not to delete
Administrators can delete an update set only when it is not the current update set and it is empty, with no sys_update_xml entries. Do not delete sys_update_xml entries: this does not undo the updates, removes any record of who applied the customizations, and leads to customizations being overwritten when the instance is upgraded. Also, do not back out the Default update set, as this can damage the configuration of the instance.
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