What is the purpose of an SLA in Knowledge base?

After how many categories will you see a search box that you can use to locate a subset of the categories in Knowledge Advanced?
Which filter type should you use in a report to display data in a tree structure?
What arethe standard status types for answers?
You want to exclude all newly created answer articles from calculating the solved count for 60 days from their creation date.
Which configuration setting should you change?