Which role would give you access to the CI Class Manager?

Which plugin should be activated to enable Article Versioning in Knowledge Management?

Which of the following CANNOT be performed by catalog_editor role?

Users with which role can Communicate a workaround or fix? (Choose two.)

A company has a custom object, Order__c, that has a required, unique, external ID field called Order_Number__c.
Which statement should be used to perform the DML necessary to insert new records and update existing records in a List of Order__c records?