Identify the Statement Below That Is False with Regards to Basic

question 29

Multiple Choice

Identify the statement below that is false with regards to basic requirements of a relational database model.

• A)Primary keys can be null.
• B)Foreign keys,if not null,must have values that correspond to the value of a primary key in another table.
• C)All non-key attributes in a table should describe a characteristic about the object identified by the primary key.
• D)Every column in a row must be single-valued.

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Definitions:

False Alarms

In signal detection theory, this refers to instances where a signal is perceived or reported, but no actual signal was present.

Specificity Theory

A principle in sensory physiology proposing that different sensory qualities are signaled by different nerve fibers.

NutraSweet

A brand name for aspartame, an artificial sweetener used in various food and beverage products.

Neurons

Specialized cells in the nervous system that transmit information to other nerve cells, muscle, or gland cells.