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When an E-R diagram is mapped to tables, the representation is redundant for

  • A.weak entity sets
  • B.weak relationship sets
  • C.strong entity sets
  • D.strong relationship sets

Answer: B

Correct answer: weak relationship sets

A weak entity is identified by its owner, so the relationship connecting the two carries no information beyond what the weak entity's own table already holds through the borrowed key. Giving that relationship a table of its own would therefore be redundant.

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