Distributed Databases The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex. True False True False ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A transaction manager is which of the following? Maintains appropriate concurrency control 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 ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A homogenous distributed database is which of the following? The same DBMS is used at each location and data are 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 not distributed across all nodes. The same DBMS is used at each location and data are 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 not distributed across all nodes. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The semijoin approach saves network traffic. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A distributed database has which of the following advantages over a centralized database? Slow Response Software complexity Modular growth Software cost Slow Response Software complexity Modular growth Software cost ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Which of the following is a disadvantage of replication? Each site must have the same storage capacity. Reduced network traffic Each transaction may proceed without coordination across the network. If the database fails at one site, a copy can be located at another site. Each site must have the same storage capacity. Reduced network traffic Each transaction may proceed without coordination across the network. If the database fails at one site, a copy can be located at another site. ANSWER DOWNLOAD EXAMIANS APP
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