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SER 322 Midterm Exam | Questions and Answers (Complete Solutions)
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SER 322 Midterm Exam | Questions and Answers (Complete Solutions) What is a Composite attribute? A. An attribute that represents a value that is derivable from a related attribute or set of attributes, not necessarily in the same entity B. An attribute that holds multiple values for a single comp...

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  • September 19, 2024
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  • 2024/2025
  • Exam (elaborations)
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SER 322 Midterm Exam


What is a Composite attribute?

A. An attribute that represents a value that is derivable from a related attribute or set of
attributes, not necessarily in the same entity

B. An attribute that holds multiple values for a single component

C. An attribute composed of multiple components each with individual existence

D. An attribute that holds a single value for a single entity

E. An attribute composed of a single component with an independent existence

A condition that an entity can be a member of at most one of the subclasses of the
specialization is called ______________.

A. completeness constraint

B. overlapping constraint

C. disjointness constraint

D. predicate constraint

A condition that an entity can be a member of more than one of the subclasses of the
specialization is called ______________.

A. completeness constraint

B. overlapping constraint

C. disjointness constraint

D. predicate constraint

A condition that every entity in the superclass must be a member of some subclass in
the specialization/ generalization is called ______________.

A. completeness constraint

B. overlapping constraint

,C. disjointness constraint

D. predicate constraint

An entity is ____________.

A. an inanimate object in an application

B. a collection of items in a mini-world

C. a distinct object or thing in a mini-world

D. data structure

An entity that does not have sufficient attributes to form a primary key is termed a
__________.

A. Variant

B. Strong entity

C. Weak entity

D. Variable

In an E-R diagram entities are represented by _______________.

A. diamond shaped box

B. circles

C. ellipse

D. rectangles

In an E-R diagram Attributes are represented by _______________.

A. diamond shaped box

B. circles

C. ellipse

D. rectangles

, In an E-R diagram Attributes are represented by _______________.

A. diamond shaped box

B. circles

C. ellipse

D. rectangles
In an E-R diagram Relationship Set are represented by _______________.

A. diamond shaped box

B. circles

C. ellipse

D. rectangles

A double rectangle represents a:
Weak Set

Relationship types of degree 3 are called _______________.

A. ternary

B. binary

C. n-ary

Suppose:
VEHICLE is a superclass{CAR, TRUCK} are subclasses of VEHICLEVEHICLE is a
_____________________of {CAR, TRUCK}.

A. union-type

B. specialization

C. generalization

D. category

What is Specialization?

A. the process of defining a set of subclasses of a superclass

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