DAT 380 Wk 1 - Practice: Pre-Course Assessment Quiz | eBooks | Education

DAT 380 Wk 1 - Practice: Pre-Course Assessment Quiz

DAT 380 Wk 1 - Practice: Pre-Course Assessment Quiz PLDZ-12784
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DAT 380 Wk 1 – Practice: Pre-Course Assessment Quiz

 

Which of the following is true of spreadsheet applications?

 

 

 

    • They enhance the user’s ability to understand the data.

 

 

    • They provide enhanced security and robust data sharing features.

 

 

    • They do not allow manipulation of data once entered.

 

 

    • They are a better alternative to databases.

 

 

 

 

 

Disjoint subtypes are subtypes that contain nonunique subsets of the supertype entity set.

 

 

 

    • True

 

 

    • False

 

 

 

 

A data dictionary is sometimes described as “the database designer’s database” because it records the design decisions about tables and their structures.

 

 

 

    • True

 

 

    • False

 

 

 

 

A weak entity has a primary key that is partially or totally derived from the parent entity in the relationship.

 

 

 

    • True

 

 

    • False

 

 

 

 

The “_____” characteristic of a primary key states that the primary key should not have embedded semantic meaning.

 

 

 

    • nonintelligent

 

 

    • unique values

 

 

    • preferably single-attribute

 

 

    • security-compliant

 

 

 

 

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