HOTSPOT
You have a SharePoint Server 2007 server farm. The farm contains a site collection. The site
collection contains a custom site definition. You migrate the farm to SharePoint Server 2010 Service
Pack 1 (SP1). You need to identify which sites fail to upgrade. What should you select from Central
Administration?
To answer, select the appropriate option in the answer area.
Answer: 
Explanation:
Select “Check Upgrade Status” in the “Upgrade and Migration” section.
Ref: http://technet.microsoft.com/en-us/library/cc424972.aspx
http://technet.microsoft.com/en-us/library/cc424972.aspx#Verify