Database - ER Model and Business Rules MCQs Part

1. An action assertion must include which of the following?

A.
Anchor object
B.
Action
C.
Corresponding object
D.
All of the above.

 Answer Option D

2. An oval represents which of the following in an EER?

A.
Attribute
B.
Entity
C.
Optional One
D.
Relationship

 Answer Option A

3. Inheritance is which of the following?

A.
When a supertype entity inherits values of the subtype attribute
B.
When a subtype entity inherits values of the supertype attribute
C.
When a supertype entity inherits values of another supertype attribute
D.
When a subtype entity inherits values of another subtype attribute

 Answer Option B

4. When an entity instance must be a member of only one subtype, it is which of the following?

A.
Disjoint with total specialization
B.
Disjoint with partial specialization
C.
Overlap with total specialization
D.
Overlap with partial specialization

 Answer Option A

5. A supertype/subtype hierarchy is which of the following?

A.
Each subtype has only one attribute.
B.
Each supertype has only one attribute.
C.
Each subtype has only one supertype.
D.
Each supertype has only one subtype.

 Answer Option C

6. A rectangle represents which of the following in an EER?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option B

7. Which one of the following symbols is not used in an ERD?

A. Rectangle
B. Oval
C. Diamond
D. Circle

 Answer Option D

8. Specialization is which of the following processes?

A. Defining one or more subtypes of the supertype and forming supertype/subtype relationships.
B. Defining one or more supertypes of the subtype and forming supertype/subtype relationships.
C. Defining one or more subtypes of the supertype and not forming supertype/subtype relationships.
D. Defining one or more supertypes of the subtype and not forming supertype/subtype relationships.

 Answer Option A

9. Which of the following statements concerning business rules is true?

A. It should be complex.
B. It should not be convertible to computer code.
C. It may include restrictions.
D. All of the above.

 Answer Option C

10. A supertype/subtype hierarchy has which of the following features?

A. Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype.
B. Attributes are assigned at the highest logical level.
C. Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.
D. Attributes are assigned at the lowest logical level.

 Answer Option B

11. A subtype discriminator is which of the following?

A. An attribute of the supertype whose values determine the subtype
B. An attribute of the subtype whose values determine the supertype
C. An attribute of the supertype whose values determine the supertype
D. An attribute of the subtype whose values determine the subtype

 Answer Option A

12. When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?

A. Disjoint with total specialization
B. Disjoint with partial specialization
C. Overlap with total specialization
D. Overlap with partial specialization

 Answer Option C

13. A subtype entity name should be which of the following?

A. A singular noun
B. Specific to the organization
C. Concise
D. All of the above

 Answer Option D

14. Use of a supertype/subtype relationship is necessary when which of the following exists?

A. An instance of a subtype participates in a relationship that is unique to that subtype.
B. An instance of a subtype participates in a relationship that is the same as the other subtypes.
C. Attributes apply to all of the instances of an entity type.
D. No attributes apply to any of the instances of an entity type.

 Answer Option A

15. Which of the following is not one of the three ways to classify an action assertion?

A. Condition
B. Integrity Control
C. Authorization
D. Enabler

 Answer Option D

6. A rectangle represents which of the following in an EER?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option B

7. Which one of the following symbols is not used in an ERD?

A. Rectangle
B. Oval
C. Diamond
D. Circle

 Answer Option D

8. Specialization is which of the following processes?

A. Defining one or more subtypes of the supertype and forming supertype/subtype relationships.
B. Defining one or more supertypes of the subtype and forming supertype/subtype relationships.
C. Defining one or more subtypes of the supertype and not forming supertype/subtype relationships.
D. Defining one or more supertypes of the subtype and not forming supertype/subtype relationships.

 Answer Option A

9. Which of the following statements concerning business rules is true?

A. It should be complex.
B. It should not be convertible to computer code.
C. It may include restrictions.
D. All of the above.

 Answer Option C

10. A supertype/subtype hierarchy has which of the following features?

A. Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype.
B. Attributes are assigned at the highest logical level.
C. Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.
D. Attributes are assigned at the lowest logical level.

 Answer Option B

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