MIS 311 Appendix C Quiz – Flashcards
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Which of the following represents an example of a multi-valued attribute of the student entity? A. Student number B. Student name C. GPA D. Phone number
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D. Phone number
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What does the Chen method use to represent entities? A. Rectangles B. Diamonds and lines C. Triangles D. Ellipse
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A. Rectangles
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Which of the following is correct? A. Entities are represented by columns in a physical database B. Attributes are represented by rows in the tables in a physical database C. Instances are represented by tables in a physical database D. None of the above is correct
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D. None of the above is correct
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Which of the below is correct about primary key? A. Primary key is a field (or group of fields) that uniquely identifies a given record in a table B. A unique primary key makes it possible to uniquely identify every row in a table C. The primary key is important to retrieve every single piece of data put into a database D. All of the above
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D. All of the above
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What are qualities of all primary keys? A. A primary key should contain some value that is highly unlikely ever to be null B. A primary key should never change its values C. A primary key should be as complicated as possible D. Both A and B
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B. A primary key should never change its values
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Which of the following is a type of attribute? A. Single-valued attribute B. Multi-valued attribute C. Null-valued attribute D. All of the above
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D. All of the above
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What kind of attribute would be given for a person who does not have an email address? A. Null-valued attribute B. Multi-valued attribute C. Single-valued attribute D. Stored attribute
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A. Null-valued attribute
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Which of the following statements is accurate? A. A correct business rule for one organization may not be correct for another organization. B. Each business rule will have entities and sometimes even attributes. C. A typical business may have hundreds of business rules. D. All of the above.
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D. All of the above.
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An Entity Relationship Diagram is a technique for documenting the entities and relationships in a database environment. A. True B. False
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A. True
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In Nate Silver's presentation, which variable was identified to have a strong predictive relationship with racism? A. Income B. Religion C. Education D. Age
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C. Education
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Which of the following was a finding from Sean Gourley's study of Iraq War? A. There was a correlation between the size of the attack (the number of people killed) and the frequency of that type of attack B. The same pattern emerged across different wars C. The identified pattern could be used to generate an equation to predict the likelihood of an attack D. All of the above
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D. All of the above
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