Synchronization for pull replication is less disruptive and occurs only when nee

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Synchronization for pull replication is less disruptive and occurs only when needed by each site, not when a central master site thinks it is best to update.

Options:

A . True

B . False

Answer: Option A

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More Questions on This Topic :

Question 1. Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distri....not interconnected by a network are known as distributed databases.

Question 2. Asynchronous technology can result in unsatisfactorily slow response time because the distributed DBMS is spending consi....an update is accurately and completely propagated across the network.

Question 3. A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.....

Question 4. An increasingly popular option for data distribution as well as for fault tolerance of any database is to store a separa....of the database at each of two or more sites.

Question 5. The purpose of timestamping is to avoid the use of locks.....

Question 6. Data replication is favored where most process requests are read-only and where the data are relatively static.....

Question 7. The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.....

Question 8. The semijoin approach saves network traffic.....

Question 9. The problem of concurrency control is more complex in a distributed database.....

Question 10. In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned....to another, and then only the required rows are returned.

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