Which of the Following Is Not True About Surrogate Keys

question 52

Multiple Choice

Which of the following is not true about surrogate keys?

• A)They are identifiers that are supplied by the system,not the users.
• B)They have no meaning to the users.
• C)They are nonunique within a table.
• D)They can be problematic when combining databases.
• E)The DBMS will not allow their values to be changed.

---

Definitions:

Yolk Sac

An extra-embryonic membrane in many vertebrates that provides food for the embryo via absorbed nutrients.

Gas Exchange

The biological process through which organisms exchange oxygen and carbon dioxide with their environment, typically occurring in the lungs or gills.

Fetus

A developing mammal or human from the end of the embryonic stage, recognizably human in form, until birth.

Amnion

A thin membrane forming a closed sac around the embryo in amniotes, containing the amniotic fluid, which provides a protective environment.