Distributed Databases
A distributed database has which of the following advantages over a centralized database?

Software complexity
Software cost
Modular growth
Slow Response

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Distributed Databases
A semijoin is which of the following?

Only the joining attributes are sent from one site to another and then all of the rows are returned.
All of the attributes are sent from one site to another and then only the required rows are returned.
Only the joining attributes are sent from one site to another and then only the required rows are returned.
All of the attributes are sent from one site to another and then only the required rows are returned.

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