Database Systems Competitive Exam MCQs – Practice Test 5 (Chapter 4)

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Free Database Design and ER Model MCQs App Download: In generalization, the higher-level entities are designated by the term; MCQ with answers: weak entity set, strong entity set, superclass, and subclass. Solve Application Security Quiz Questions, download Google e-Book (Free Chapter) to achieve SQL success.

Database Design and ER Model MCQs – Practice Test 5 PDF Download

MCQ 21: A relationship line may have an associated minimum and maximum:

Values
Cardinalities
Range
Attributes

MCQ 22: In generalization, the higher-level entities are designated by the term:

Strong entity set
Weak entity set
Superclass
Subclass

MCQ 23: The entity-relationship model is used to represent the conceptual design of the database at the level:

First stage
Second stage
Third stage
Fourth stage

MCQ 24: Specifying whether or not an entity in the superclass set must belong to at least one of subclass sets within specialization, by the constraint type:

Completeness constraint
Disjointness constraint
Overlapping constraint
Existence constraint

MCQ 25: In E-R diagrams, a weak entity set is represented via a:

Rectangle
Diamond
Circle
Double diamonds

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