When Moving Data from Permanent Storage to RAM, an I/O

question 36

Multiple Choice

When moving data from permanent storage to RAM, an I/O disk operation retrieves a(n) :

• A) entire table.
• B) entire physical disk block.
• C) single row containing the attribute requested.
• D) single attribute requested only.

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Definitions:

Pie Graph

A circular chart divided into sectors, each representing a proportion of the whole.

Ordinal Scale

A ranking scale in which data can be ordered but the intervals between values are not known or are not meaningful.

Frequency Distribution

The representation, either in a graph or table form, of how often each value occurs in a set of data.

Sample

A subset of individuals from a larger population, selected to represent the population in a study.