How managed metadata works in CQWP

Please read the below good articles before go with querying the managed metadata column values through Content Query Web part:

https://chrisjohnson.tech/2014/03/25/sharepoint-querying-on-multiple-select-managed-metadata-columns-in-content-query-web-parts/

-Thanks to Chris.

https://blogs.msdn.microsoft.com/ecm/2010/05/14/whats-new-with-the-content-query-web-part/ 

Sharepoint administrator interview questions with answers:MMS

1. What is the “Managed metadata” column and use of it?
2. What is the “Enterprise Keyword” column and use of it?
3. What is the “TaxonomyHiddenList” list and use of it?
4. Enterprise keyword Vs Managed Metadata?
5. How to check enterprise keyword option is enabled? Means I cannot go to the each list/library level and confirm enabled/disabled?
6. How to disable the Enterprise keywords from the list/library?
7. Is it possible to stop creating new keywords when add new values to the enterprise keyword column in list/library?
8. Error: Failed to create a term set: A default managed metadata service connection hasn’t been specified.
9. Error: The Managed Metadata Service or Connection is currently not available. The Application Pool or Managed Metadata Web Service may not have been started. Please Contact your Administrator.
10. Error: Users were unable to view the enterprise keywords in sharepoint list/library?
11. Error: Users can’t see the values of the Managed Metadata Columns for list items?
12. Error: The site doesn’t contain a default term keywords term store?
13. Error: "The default term store for this site cannot be identified."

Am preparing answers for the above questions. Will post you soon.

Thanks,
Sasi kumar Reddy