A ____ is a mechanism that prevents changes to a database for a period of time.
A) flag
B) lock
C) permission
D) transaction

Question

Quizplus · Accepted Answer

A lock is a mechanism used to prevent changes to a database for a period of time. It is commonly used in multi-user environments to ensure that two or more users cannot make conflicting changes to the same data simultaneously. A flag is a variable or indicator that is used to signal a certain condition or state. Permissions and transactions are also components of database management systems, but they do not directly prevent changes to a database for a period of time.

A ____ Is a Mechanism That Prevents Changes to a Database