Distributed Databases A transaction manager is which of the following? Maintains a log of transactions All of these Maintains before and after database images Maintains appropriate concurrency control Maintains a log of transactions All of these Maintains before and after database images Maintains appropriate concurrency control 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 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. True False True False ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases With failure transparency, all of the actions of a transaction are committed or none of them are committed. True False True False ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Location transparency allows for which of the following? Users to treat the data as if it is at one location Programmers to treat the data as if it is at one location Managers to treat the data as if it is at one location All of these Users to treat the data as if it is at one location Programmers to treat the data as if it is at one location Managers to treat the data as if it is at one location All of these ANSWER DOWNLOAD EXAMIANS APP
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. The same 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. A different DBMS is used at each location and data are distributed across all nodes. A different 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. The same 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. ANSWER DOWNLOAD EXAMIANS APP
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