When Transforming an ID-Dependent E-R Data Model Relationship into a Relational

question 49

Multiple Choice

When transforming an ID-dependent E-R data model relationship into a relational database design,the referential integrity constraints should allow ________.

• A)parent updates to cascade
• B)child updates to cascade
• C)child deletes to cascade
• D)A and B
• E)A,B,and C

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Definitions:

Reptiles

A group of cold-blooded animals with scaly skin that typically lay eggs on land, such as snakes, lizards, crocodiles, and turtles.

Amphibians

A class of cold-blooded vertebrates that includes frogs, toads, salamanders, and newts, primarily living in moist environments.

Birds

Warm-blooded vertebrates characterized by feathers, beak with no teeth, laying hard-shelled eggs, and a high metabolic rate; members of the class Aves.

Interbreed

To mate or cross different breeds, varieties, or species of organisms, often resulting in hybrid offspring.