Which of the Following Is True About Representing a Weak

question 80

Multiple Choice

Which of the following is true about representing a weak entity with the relational model?

• A) If the weak entity is existence-dependent, the key of the parent must be part of the key of the weak entity.
• B) If the strong entity has a minimum cardinality of 1, the key of the weak entity must be part of the strong entity.
• C) If the weak entity is ID-dependent, the key of the weak entity must be part of the key of the parent entity.
• D) If the weak entity is ID-dependent, the key of the parent entity must be part of the key of the weak entity.
• E) If the parent entity is existence-dependent, then the minimum cardinality of the weak entity is zero.

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Definitions:

Chlorophyte

Chlorophyte refers to green algae, a diverse group of photosynthetic organisms found in various aquatic environments, part of the eukaryotic kingdom Chlorophyta.

Seaweed

Multicellular algae that grow in marine or freshwater environments, often used as food or fertilizer.

Sea Lettuce

A common name for Ulva, a genus of edible green algae that grows in salty waters around the world.

Ulva

A genus of green algae, commonly known as sea lettuce, found in marine and brackish water environments.