Q. What do double diamonds represent in an ER diagram

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Q. What does a directed line ( → ) from a relationship set to two entity sets mean?

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Q. How are roles specified in an ER diagram

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Q. For schemas derived from strong entity sets, the _______ of the entity set serves as the primary key of the resulting schema

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Q. State true or false: Derived attributes cannot be directly represented in the relational data model

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Q. The primary key of the representation of a weak entity set consists of the primary key of the strong entity set and the _______

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Q. For a binary many to many relationship, the ________ of the participating entity sets becomes the prime attribute

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Q. For a binary one to one relationship, the ________ of the participating entity sets becomes the prime attribute

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Q. For a n-ary relationship set without arrows, the ________ of the participating entity sets becomes the prime attribute

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Q. State true or false: The schema for the relationship set linking a weak entity set to its corresponding strong entity set is redundant.

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Q. Statement 1: We can create foreign key constraints on relational schema derived from ER diagram
Statement 2: Relational schema cannot be derived from an ER diagram

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Q. Which of the following can affect the placement of the relationship attributes?

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Q. The process of designating sub groupings within the entity set is called as _______

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Q. State true or false: Specialization can be applied only once

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Q. Which of the following is the specialization that permits multiple sets

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Q. The similarities between the entity set can be expressed by which of the following features?

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Q. Higher level entity sets are designated by the term _________

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Q. State true or false: The attributes of the higher level entity sets are inherited by the attributes of the lower level entity sets

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Q. Which of the following is not a generalization constraint?

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Q. Condition defined generalization constraint is also said to be ________

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