Examveda
Examveda

A transaction manager is which of the following?

A. Maintains a log of transactions

B. Maintains before and after database images

C. Maintains appropriate concurrency control

D. All of the above

Answer: Option D

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Related Questions on Distributed Databases

An autonomous homogenous environment is which of the following?

A. The same DBMS is at each node and each DBMS works independently.

B. The same DBMS is at each node and a central DBMS coordinates database access.

C. A different DBMS is at each node and each DBMS works independently.

D. A different DBMS is at each node and a central DBMS coordinates database access.