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

DAT 380 Wk 1 - Practice: Pre-Course Assessment Quiz PLDZ-16110 Free
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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

 

Each row in the relational table is known as an entity instance or entity occurrence in the ER model.

  •      True
  •      False

 

In Oracle, you can use the SQL*Plus command SHOW ERRORS to help you diagnose errors found in PL/SQL blocks.

  •      True
  •      False

 

 

Structure is based on the type of processing to be performed on the data.

  •      True
  •      False

In the context of total completeness, in a(n) _____, every supertype occurrence is a member of at least one subtype.

  •      disjoint constraint
  •      overlapping constraint
  •      unique constraint
  •      foreign key constraint

 

 

A(n) _____ is the attribute in the supertype entity that determines to which entity subtype each supertype occurrence is related.

  •      subtype discriminator
  •      entity supertype
  •      specialization hierarchy
  •      inheritance discriminator
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