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:

Prompt

A message or symbol on a computer screen that indicates the system is ready to receive input from the user.

Temporary Holding Area

A space in memory used to temporarily store data while it is being moved or processed.

Buffer

A temporary storage area in memory used to hold data while it is being transferred from one location to another.

Register

A register in computing is a small, fast storage location within a CPU designed to quickly access and store the data that is immediately needed for processing.