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DATA C170 PRE-ASSESSMENT: DATA MANAGEMENT - FOUNDATIONS (PFKO)
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DATA C170 PRE-ASSESSMENT: DATA MANAGEMENT - FOUNDATIONS (PFKO)
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DATA C170 PRE-ASSESSMENT: DATAMANAGEMENT - FOUNDATIONS (PFKO)
, DATA C170 PRE-ASSESSMENT: DATA MANAGEMENT
- FOUNDATIONS (PFKO)
What is a broad definition of data? - Correct Answer-Raw facts that are captured on
printed or digital media
What are data? - Correct Answer-Facts that are collected and stored in a database
system
What is a determining characteristic of unstructured data? - Correct Answer-It does not
follow a data model.
Which is true about flat files? - Correct Answer-They contain no internal hierarchical
organization.
Which technology has no internal hierarchy? - Correct Answer-Flat files
How were data retrieved before database management systems? - Correct Answer-
Sequentially from simple files
In which two ways does a database management system environment increase
effectiveness in working with data? - Correct Answer-- It enables data sharing,
- It permits storage of vast volumes of data.
What is the uniquely identifiable element about which data can be categorized in an
entity-relationship diagram? - Correct Answer-Entity types
Which classification is correct for the box marked "Quantity" in the given entity-
relationship diagram? - Correct Answer-Intersection data
Which data classification is an entity? - Correct Answer-Event
A salesperson is authorized to sell 12 products; a product can be sold by 10
salespersons.
Which kind of binary relationship is described in this example? - Correct Answer-Many-
to-many
Which three kinds of rules for referential integrity are provided by modern relational
database management systems? - Correct Answer-Insert, Delete, Update
What is an important aspect of "referential integrity"? - Correct Answer-Reference to
data in one relation is based on values in another relation.
Sales data, detailing the customer names, products sold, and salespersons, is kept in a
database.
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