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Database - ER Model and Business Rules

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Exercise : ER Model and Business Rules - General Questions
1.
An action assertion must include which of the following?
Anchor object
Action
Corresponding object
All of the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
An oval represents which of the following in an EER?
Attribute
Entity
Optional One
Relationship
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Inheritance is which of the following?
When a supertype entity inherits values of the subtype attribute
When a subtype entity inherits values of the supertype attribute
When a supertype entity inherits values of another supertype attribute
When a subtype entity inherits values of another subtype attribute
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
When an entity instance must be a member of only one subtype, it is which of the following?
Disjoint with total specialization
Disjoint with partial specialization
Overlap with total specialization
Overlap with partial specialization
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
A supertype/subtype hierarchy is which of the following?
Each subtype has only one attribute.
Each supertype has only one attribute.
Each subtype has only one supertype.
Each supertype has only one subtype.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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