A distributed database has which of the following advantages over a centralized database? Software complexity Software cost Slow Response Modular growth TRUE ANSWER : ? YOUR ANSWER : ?
Replication should be used when which of the following exist? 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 The application's data can be somewhat out-of-date. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a disadvantage of replication? Each site must have the same storage capacity. Each transaction may proceed without coordination across the network. Reduced network traffic If the database fails at one site, a copy can be located at another site. TRUE ANSWER : ? YOUR ANSWER : ?
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 TRUE ANSWER : ? YOUR ANSWER : ?
A homogenous distributed database is which of the following? A different 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 not distributed across all nodes. The same DBMS is used at each location and data are distributed across all nodes. TRUE ANSWER : ? YOUR ANSWER : ?
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 ANSWER : ? YOUR ANSWER : ?
Each site (or node) in a distributed system is subject to the same types of failure as in a centralized system. True False TRUE ANSWER : ? YOUR ANSWER : ?
Data replication is favored where most process requests are read-only and where the data are relatively static. True False TRUE ANSWER : ? YOUR ANSWER : ?