For the Following Entity-Relationship Diagram, What Could the Primary Key

question 54

Multiple Choice

For the following entity-relationship diagram, what could the primary key be in the Grade entity?

• A) Primary key in Student entity
• B) Primary key in Course entity
• C) Its own primary key.
• D) Primary key made up of the primary keys in Student entity and Course entity
• E) It doesn't need a primary key.

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Definitions:

Relative Risk

A measure used in epidemiology to determine the likelihood of a health event occurring in one group compared to another.

Incidence

The rate or number of new cases of a particular condition detected in a specific population within a given time period.

Prevalence

The proportion of a population found to have a particular condition or characteristic at a specific time.

Meta-analysis

A statistical technique that combines the results of multiple scientific studies to identify patterns, differences, or effects that the individual studies may be too small to detect on their own.