Question

Which of the following is a key part of physical design in an entity relationship model?

O in this model, no attributes are specified.
O this model adds all of the attributes for each entity.
O this model converts entities into tables.
O this model has normalization that occurs.

Answer 1

The key part of physical design in an entity relationship model is the conversion of entities into database tables, essential for determining how data will be structured in the database.

Step-by-step explanation:

The key part of physical design in an entity relationship model is that this model converts entities into tables. Physical design involves translating the conceptual design, usually represented by entity-relationship diagrams, into a functional database structure. In this phase, entities and their relationships are turned into database tables; each entity becomes a table, and the attributes of the entities become the columns of the table.

Additionally, the links between entities are established through foreign keys, and other constraints are applied to ensure data integrity. This step is crucial as it determines how data will be stored, retrieved, and organized within the database system.

During the physical design process, normalization may also occur, although it is not a step exclusive to this phase. Normalization is the process of organizing data to reduce redundancy and improve data integrity. It typically follows creating the initial table structures and can continue to adjust as the design is refined.

Note that specifying attributes for each entity is a part of the logical design, not physical. No attributes are specified only applies to the very early stages of modeling, which is not the focus of physical design.