PrepAway - Latest Free Exam Questions & Answers

This principle of data integrity is known as:

In an online transaction processing system, data integrity is maintained by ensuring that a transaction is either
completed in its entirety or not at all. This principle of data integrity is known as:

PrepAway - Latest Free Exam Questions & Answers

A.
isolation.

B.
consistency.

C.
atomicity.

D.
durability.

Explanation:
The principle of atomicity requires that a transaction be completed in its entirety or not at all. If an error or
interruption occurs, all changes made up to that point are backed out. Consistency ensures that all integrity
conditions in the database be maintained with each transaction. Isolation ensures that each transaction is
isolated from other transactions; hence, each transaction only accesses data that are part of a consistent
database state. Durability ensures that, when a transaction has been reported back to a user as complete, the
resultant changes to the database will survive subsequent hardware or software failures.


Leave a Reply