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DAT 380 Wk 2 - Practice Knowledge Check

DAT 380 Wk 2 - Practice Knowledge Check PLDZ-13208 Free
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DAT 380 Wk 2 - Practice Knowledge Check

The row's range of permissible values is known as its domain.

  • True
  • False

 

RDBMSs enforce integrity rules automatically.

  • True
  • False

 

Character data can contain any character or symbol intended for mathematical manipulation.

  • True
  • False

 

_____, also known as RESTRICT, yields values for all rows found in a table that satisfy a given condition.

  • UNION
  • DIFFERENCE
  • INTERSECT
  • SELECT

 

A weak relationship exists if the primary key of the related entity contains at least one primary key component of the parent entity.

  • True
  • False

 

Only a single attribute, not multiple attributes, can define functional dependence.

  • True
  • False

 

_____ returns only the attributes requested, in the order in which they are requested.

  • SELECT
  • UNION
  • PROJECT
  • DIFFERENCE

 

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

 

In the relational model, _____ are important because they are used to ensure that each row in a table is uniquely identifiable.

  • keys
  • relations
  • logical structures
  • indexes

 

A _____ relationship exists when an association is maintained within a single entity.

  • ternary
  • unary
  • weak
  • strong

 

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