ER Model and Business Rules - Database MCQ Questions and answers- Technical Aptitude Page-2 section-1

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

A. Attribute

B. Entity

C. Optional One

D. Relationship

A. Rectangle

B. Oval

C. Diamond

D. Circle

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.

A. It should be complex.

B. It should not be convertible to computer code.

C. It may include restrictions.

D. All of the above.

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.