ER Model and Business Rules

Q1: 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.

Q2: 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.

Q3: An action assertion must include which of the following?

A Anchor object

B Action

C Corresponding object

D All of the above.

Q4: 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

Q5: 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.

Q6: 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

Q7: 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

Q8: 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.

Q9: 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

Q10: 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

Q11: A rectangle represents which of the following in an EER?

A Attribute

B Entity

C Optional One

D Relationship

Q12: Which one of the following symbols is not used in an ERD?

A Rectangle

B Oval

C Diamond

D Circle

Q13: 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.

Q14: 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

Q15: 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.

Q16: An oval represents which of the following in an EER?

A Attribute

B Entity

C Optional One

D Relationship

Q17: 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


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