Distributed Databases An increasingly popular option for data distribution as well as for fault tolerance of any database is to store a separate copy of the database at each of two or more sites. True False True False 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 Some of the columns of a relation are at different sites is which of the following? Vertical Partitioning Data Replication Horizontal and Vertical Partitioning Horizontal Partitioning Vertical Partitioning Data Replication Horizontal and Vertical Partitioning Horizontal Partitioning ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Replication should be used when which of the following exist? The application's data can be somewhat out-of-date. When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. All of these When using many nodes with different operating systems and DBMSs and database designs. The application's data can be somewhat out-of-date. When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. All of these When using many nodes with different operating systems and DBMSs and database designs. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A transaction manager is which of the following? All of these Maintains a log of transactions Maintains before and after database images Maintains appropriate concurrency control All of these Maintains a log of transactions Maintains before and after database images Maintains appropriate concurrency control ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Asynchronous technology can result in unsatisfactorily slow response time because the distributed DBMS is spending considerable time checking that an update is accurately and completely propagated across the network. False True False True ANSWER DOWNLOAD EXAMIANS APP
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