WGU C172 Pre-Assessment UPDATED Actual Exam Questions and CORRECT Answers
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WGU C172 Pre-Assessment
Institution
WGU C172 Pre-Assessment
WGU C172 Pre-Assessment UPDATED
Actual Exam Questions and CORRECT
Answers
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 dete...
WGU C172 Pre-Assessment UPDATED
Actual Exam Questions and CORRECT
Answers
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.
Which kind of data in this database would qualify as intersection data related to both the
product and salesperson entities? - CORRECT ANSWER- ✔✔Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? -
CORRECT ANSWER- ✔✔Primary key
What is necessary for a primary key in one relation of a database to match with its
corresponding foreign key in another relation of the same database? - CORRECT ANSWER-
✔✔A domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? -
CORRECT ANSWER- ✔✔The alternate key
What is a term for a set of columns in a table that can uniquely identify any record in that
table without referring to other data? - CORRECT ANSWER- ✔✔Candidate key
What happens to the original data in database indexing? - CORRECT ANSWER- ✔✔It is
copied to the index.
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