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

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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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