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In an E-R diagram a derived attribute is represented by

  • A.Ellipse
  • B.Dashed ellipse
  • C.Rectangle
  • D.Triangle

Answer: D

Correct answer: Dashed ellipse

A dashed (broken) ellipse marks a derived attribute - one computed from other data rather than stored, such as age derived from date of birth. A plain ellipse is an ordinary attribute, a double ellipse a multivalued one, and a rectangle an entity set.

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