HOTSPOT
A company uses SharePoint Server to manage document templates. Each department
stores its templates in a department-specific site collection. All templates use a content type
named Corporate Templates. Templates are stored in document library apps with other
types of files.
The Search service application must meet the following requirements:
Users can search from a single location across all department site collections.
Search results include content from all site collections that contain templates.
You need to configure the Search service application to meet the requirements.
On the Search Administration page, which search feature should you configure? (To answer,
select the appropriate feature in the answer area.)
Answer: 
Explanation:
It is barely obvious in question that we need to narrow results to only templates.
if we do, then we can use Result Sources for that:
https://technet.microsoft.com/en-us/library/dn186229.aspx
•A query transform, which can narrow results from the given search provider or URL to a specified subset — for example, a subset that has a particular content type
You don’t include results that are templates, you include results from all site collections that contain templates.
Poorly written, but an important distinction