It Is Possible for Local DBMSs to Commit Updates at Some

question 44

Multiple Choice

It is possible for local DBMSs to commit updates at some sites and undo updates at other sites. How can this inconsistency be prevented?

• A) using a two-step rollback
• B) using a two-phase commit
• C) using a two-phase rollback
• D) using a two-phase transaction

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Definitions:

Crowded

A situation or place where there is a high density of people or objects in a given area.

Predicate

The component of a sentence or an equation that expresses what is said about the subject, often involving a verb or relationship indicating properties or actions.

Proposition

An assertion that conveys a judgment or viewpoint.

Relativity

A theory in physics, formulated by Albert Einstein, that describes the interrelation of space, time, and gravitation, indicating how they are perceived differently depending on the observer's motion.