For Facebook I would agree that it has a database and a database management system. Every message, story and picture is stored on Facebook’s own servers and what you can see or enter in the database is governed by some logic that starts with checking your credentials.
For Google however it is...
Nice question, if you ever find the answer please let me know.
I guess it depends on how you look at it. When you look at Google as a DBMS then what is the database? I suppose the database is formed by all pages written by us and spread over countless servers all over the world. On Google's...