Distributed Databases In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned. 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 Which of the following is a disadvantage of replication? Reduced network traffic Each site must have the same storage capacity. Each transaction may proceed without coordination across the network. If the database fails at one site, a copy can be located at another site. Reduced network traffic Each site must have the same storage capacity. 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
Distributed Databases Location transparency allows for which of the following? 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 Users to treat the data as if it is at one location Programmers to treat the data as if it is at one location ANSWER DOWNLOAD EXAMIANS APP
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 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. True False True False ANSWER DOWNLOAD EXAMIANS APP
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