Distributed Databases
A distributed database can use which of the following strategies?

Partially or totally replicated across sites
Totally centralized at one location and accessed by many sites
All of these
Partitioned into segments at different sites

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Distributed Databases
A homogenous distributed database is which of the following?

A different DBMS is used at each location and data are not distributed across all nodes.
A different DBMS is used at each location and data are distributed across all nodes.
The same DBMS is used at each location and data are not distributed across all nodes.
The same DBMS is used at each location and data are distributed across all nodes.

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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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Distributed Databases
A distributed database is which of the following?

A loose collection of file that is spread to multiple locations and is interconnected by a network
A single logical database that is limited to one location.
A single logical database that is spread to multiple locations and is interconnected by a network
A loose collection of file that is limited to one location.

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