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
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 The semijoin approach saves network traffic. True False True False ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Storing a separate copy of the database at multiple locations is which of the following? Vertical Partitioning Horizontal Partitioning Data Replication Horizontal and Vertical Partitioning Vertical Partitioning Horizontal Partitioning Data Replication Horizontal and Vertical Partitioning ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Replication should be used when which of the following exist? When using many nodes with different operating systems and DBMSs and database designs. The application's data can be somewhat out-of-date. All of these When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. When using many nodes with different operating systems and DBMSs and database designs. The application's data can be somewhat out-of-date. All of these When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A distributed database can use which of the following strategies? Partially or totally replicated across sites Totally centralized at one location and accessed by many sites All of these Partitioned into segments at different sites Partially or totally replicated across sites Totally centralized at one location and accessed by many sites All of these Partitioned into segments at different sites ANSWER DOWNLOAD EXAMIANS APP
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