Christianson UPDATED Exam Questions
and CORRECT Answers
structured information - CORRECT ANSWER - Usually considered to be facts and data. It is
reasonably orderly, and can be broken down into component parts and organized into hierarchies.
unstructured information - CORRECT ANSWER - has no inherent structure or order, and the
parts can't be easily linked together. It is more difficult to break down, categorize, organize, and
query. Drawing information out of unstructured collections presents challenges.
semi-structured information - CORRECT ANSWER - shows at least some structure.
Meta Data - CORRECT ANSWER - - Where you took a photo
• Who you called and for how long
• Who did you send an email to and when did you send it.
• When you login to facebook, snapchat or tinder.
• How long your car was turned on
• etc, etc, etc.
Relational integrity constraint - CORRECT ANSWER - rule that enforces basic and
fundamental information based constraints
Business-critical integrity constraint - CORRECT ANSWER - rule that enforce business rules
vital to an organization's success and often require more insight and knowledge than relational
integrity constraints
two relational integrity constraints for an ordering system - CORRECT ANSWER - • Users
cannot create an order for a nonexistent
customer
, • An order cannot be shipped without an address
two business-critical integrity constraints for an ordering system - CORRECT ANSWER -•
Product returns are not accepted for fresh
product 15 days after purchase
• A discount maximum of 20 percent
Password - CORRECT ANSWER - provides authentication of the user
Access level - CORRECT ANSWER - determines who has access to the different types of
information
Access control - CORRECT ANSWER - determines types of user access, such as read-only
access
Edgar F. Codd - CORRECT ANSWER - Relational Databases
Primary Key - CORRECT ANSWER - Indicates uniqueness within records or rows in a table.
-Primary keys ideally composed of only single
attribute
attribute
• Modern Database Management Software can
auto-number Primary Keys (1,2,3,4....) and
make sure they are unique
Foreign Key - CORRECT ANSWER - the Primary key from another table, this is the only
way join relationships can be established.