Which of the following statements is TRUE?

Coal India Management Trainee CBT · 2017 · 2017 System · Paper II · Domain Knowledge

1. A.

   The cardinality ratio for a binary relationship specifies the maximum number of relationship instances that an entity can participate in.

2. B.

   The cardinality ratio for a binary relationship specifies the minimum number of relationship instances that an entity can participate in..

3. C.

   The partial participation constraint is also called existence dependency

4. D.

   The cardinality ratio for a binary relationship specifies the average number of relationship instances that an entity can participate in.

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