Distributed Databases MCQs
Practice free Distributed Databases multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 32 questions — no login required.
Question 19hard
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.
Question 20hard
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.
Question 21hard
Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distributed databases.
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Question 22hard
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.
Question 23hard
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.
Question 24hard
A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.
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Question 26hard
Data replication is favored where most process requests are read-only and where the data are relatively static.
Question 27easy
The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.