Software Engineering Virtual Lab — IIT Kharagpur

E-R Modeling from the Problem Statements

1. Entity Relationship model is used to represent the database at a

Logical level

Physical level

2. In ER model an entity is usually related to another entity. The relationship is indicated by a

Rectangle

Ellipse

Triangle

Diamond

3. An entity set could be related to itself

True

False

4. A prime attributes is indicated by

Underline inside an ellipse

Double ellipse

Dotted ellipse

Dotted rectangle

5. Students study in schools -- this is a

1:1 mapping

1:N mapping

M:1 mapping

M:N mapping

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