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Question

What in a distributed database supports multi-user access?

A
Distribution design
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B
Concurrency control
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C
Replication
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D
Redundancy
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Solution

The correct option is A Concurrency control

Concurrency control in a distributed database supports multi-user access.

Concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.

Concurrency control:-

Concurrency control is a database management systems (DBMS) concept that is used to address conflicts with the simultaneous accessing or altering of data that can occur with a multi-user system.

Multiuser database system:-

A multiuser database system must allow multiple users access to the database at the same time. As a result, the multiuser DBMS must have concurrency control strategies to ensure several users access to the same data item at the same time, and to do so in a manner that the data will always be correct data integrity.

Distributed database:-

A distributed database is a database in which not all storage devices are attached to a common processor. It may be stored in multiple computers, located in the same physical location; or may be dispersed over a network of interconnected computers.


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