Which one of the following is used to represent the supporting many-one relationships of a weak enti

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GATE-CS is a competitive examination conducted in India. This question is from the 2020 GATE-CS Database Management Systems paper.

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Question

Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?

Accepted Answer

Correct Answer: (C) Diamonds with double/bold borderConcept -- ER Diagram Notation for Weak Entities: In the standard ER diagram notation: rectangles represent entity sets; rectangles with double/bold borders represent weak entity sets; diamonds represent relationship sets; diamonds with double/bold borders represent identifying relationships (the relationship that connects a weak entity set to its owner/strong entity set). Ovals represent attributes; ovals with underlined names represent key attributes. The identifying relationship (also called the supporting relationship) of a weak entity set uses a double/bold diamond. Weak entity sets themselves use double/bold rectangles. The question asks specifically for the symbol for the identifying relationship, which is a double diamond.

Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?

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Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?

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