Question: 1) Identifying relationships between a weak entity set and its identifying owner entity set may be optional for the identifying owner entity set. True or

1) Identifying relationships between a weak entity set and its identifying owner entity set may be optional for the identifying owner entity set.

True or False

2) In the network data model, a record type may participate in more than one owner-member relationship as a member.

True or False

3) In the Entity-Relationship modeling, the partial key of a weak entity set identifies each weak entity from this set uniquely.

True or False

4) In the Entity-Relationship modeling, a descriptive attribute of a relationship set can be used to identify a relationship instance uniquely from the set.

True or False

5) Provided R is a relation with three fields A, B, and C. A, B, and C form a superkey of the relation R.

True or False

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