Distributed Databases A transaction manager is which of the following? Maintains before and after database images All of these Maintains a log of transactions Maintains appropriate concurrency control Maintains before and after database images All of these Maintains a log of transactions Maintains appropriate concurrency control ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Data replication is favored where most process requests are read-only and where the data are relatively static. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The purpose of timestamping is to avoid the use of locks. True False True False ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The semijoin approach saves network traffic. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations. True False True False ANSWER DOWNLOAD EXAMIANS APP
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