WGU COMPREHENSIVE TEST 2026 SOLVED
QUESTIONS
◉ Foreign Key. Answer: Field that is a primary key to another table.
◉ Schema. Answer: The complete description of the database.
◉ Variable. Answer: a data type or simply type is a classification of
data which tells the compiler or interpreter how the programmer
intends to use the data; can become incompatible with data
warehouse design.
◉ Flat File Database. Answer: Stores data in plain text, holding one
record; cannot contain multiple tables like a relational database.
◉ Online Analytical processing (OLAP). Answer: analyze transaction
data used for making decisions; multidimensional (cubical) data;
requires a lengthy, complex loading and updating phase.
◉ Online transaction processing (OLTP). Answer: database design
used for browsing and manipulating business transaction activity.
,Processing of information into the database.
Don't perform analyses on these databases because it could affect
performance.
◉ relational database. Answer: type of database in which multiple
information files are combined into one database in one location,
where data are stored in two-dimensional tables known as relations
and contain multiple entities and attributes
◉ Object-Oriented Database. Answer: A database that is designed to
store mixed media, as opposed to tables in relational databases.
◉ Conceptual Data Model. Answer: a map of concepts and their
relationships used for databases.
◉ Logical Data Model. Answer: Provides foundation for designing a
database
◉ Physical Data Model. Answer: a representation of a data design as
implemented, or intended to be implemented, in a database
management system
, ◉ Pointers. Answer: Used to show the relationship between data
fields and tables.
◉ Referential Integrity. Answer: Table relationships must always be
consistent; for an entity or object to exist in a table, an equal value
must exist in the referenced table; the primary and foreign keys
must be equal.
◉ Types of relationships in a relational database model. Answer:
One-to-One, One-to-Many, and Many-to-Many
◉ Data Manipulation Language. Answer: A language that allows
users to easily modify the data in a database.
◉ Data Warehousing. Answer: a system used for reporting and data
analysis, and is considered a core component of business
intelligence; data is stored in one place.
◉ data mart. Answer: smaller subset database from a data
warehouse typically focused on a single area or function.
◉ Extraction, transformation, and loading (ETL). Answer: a process
in which data is extracted from a computer, transformed (or
cleansed) into a format appropriate for the data warehouse, and
then transferred to the data warehouse.