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Database - Distributed Databases

Exercise : Distributed Databases - General Questions
11.
A distributed database is which of the following?
A single logical database that is spread to multiple locations and is interconnected by a network
A loose collection of file that is spread to multiple locations and is interconnected by a network
A single logical database that is limited to one location.
A loose collection of file that is limited to one location.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
A semijoin is which of the following?
Only the joining attributes are sent from one site to another and then all of the rows are returned.
All of the attributes are sent from one site to another and then only the required rows are returned.
Only the joining attributes are sent from one site to another and then only the required rows are returned.
All of the attributes are sent from one site to another and then only the required rows are returned.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Which of the following is a disadvantage of replication?
Reduced network traffic
If the database fails at one site, a copy can be located at another site.
Each site must have the same storage capacity.
Each transaction may proceed without coordination across the network.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
A distributed database can use which of the following strategies?
Totally centralized at one location and accessed by many sites
Partially or totally replicated across sites
Partitioned into segments at different sites
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following is not one of the stages in the evolution of distributed DBMS?
Unit of work
Remote unit of work
Distributed unit of Work
Distributed request
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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