Which of the following roles can delete cart layout?

Which of the following is set as the default value for Category in Incident form?

Which of the following can the end user see in the related search result?

An Order Guide can include multiple Items. Items have common variables, such as Shipping Location, and Requester. Which field on the Order Guide, when set to true, automatically copies the common variable values to corresponding variables on each included Item?

A company has code to update a Request and Request Lines and make a callout to their external ERP system's REST endpoint with the updated records.

The CalloutUtil.makeRestCallout fails with a "You have uncommitted work pending. Please commit or rollback before calling out" error.
What should be done to address the problem?