Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.
Which of the following is a disadvantage of replication?
Replication should be used when which of the following exist?
Storing a separate copy of the database at multiple locations is which of the following?
A transaction manager is which of the following?
Location transparency allows for which of the following?
In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned.
A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.
The purpose of timestamping is to avoid the use of locks.
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.
With asynchronous technology, if any copy of a data item is updated anywhere on the network, the same update is immediately applied to all other copies or it is aborted.
A distributed database can use which of the following strategies?
Which of the following is not one of the stages in the evolution of distributed DBMS?
A heterogeneous distributed database is which of the following?
The problem of concurrency control is more complex in a distributed database.
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