What do double diamonds represent in an ER diagram(a) They link entity sets to relationship sets(b) Total participation of an entity in a relationship set(c) Relationship sets linked to weak entity sets(d) None of the mentionedThis question was posed to me during an interview.I need to ask this question from Entity Relationship Diagrams in division Database Design and the ER Model of RDBMS

What do double diamonds represent in an ER diagram(a) They link entity

1.	What do double diamonds represent in an ER diagram(a) They link entity sets to relationship sets(b) Total participation of an entity in a relationship set(c) Relationship sets linked to weak entity sets(d) None of the mentionedThis question was posed to me during an interview.I need to ask this question from Entity Relationship Diagrams in division Database Design and the ER Model of RDBMS
Answer» The CORRECT ANSWER is (c) Relationship SETS linked to weak ENTITY sets Explanation: The double diamonds represent the relationship sets linked to weak entity sets. Weak entity sets are the sets that do not have a primary KEY.

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