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NIELIT 2021 Dec Scientist A - Section B: 49

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Correct Answer : (D) Multi-valued attribute

In ER Diagram,

  1. Strong Entity – Rectangle
  2. Weak Entity – Double rectangle or Bold rectangle
  3. Strong Relationship – Diamond
  4. Identifying/Weak Relationship – Double diamond or Bold diamond
  5. Simple attribute – Ellipse
  6. Multi-valued attribute – Double ellipse
  7. Derived attribute – Dotted ellipse
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