WGU C175 Final+1+2 Latest 2022
Already Passed
What is a broad definition of data? ✔✔Raw facts that are captured on printed or digital media
What are data? ✔✔Facts that are collected and stored in a database system
What is a determining characteristic of unstructured data? ✔✔It does not follow a data model.
Which is true about flat files? ✔✔They contain no internal hierarchical organization.
Which technology has no internal hierarchy? ✔✔Flat files
How were data retrieved before database management systems? ✔✔Sequentially from simple files
In which two ways does a database management system environment increase effectiveness in
working with data? ✔✔- 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? ✔✔Entity types
Which classification is correct for the box marked "Quantity" in the given entity-relationship
diagram? ✔✔Intersection data
Which data classification is an entity? ✔✔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? ✔✔Many-to-many
Which three kinds of rules for referential integrity are provided by modern relational database
management systems? ✔✔Insert, Delete, Update
What is an important aspect of "referential integrity"? ✔✔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? ✔✔Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? ✔✔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? ✔✔A domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? ✔✔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? ✔✔Candidate key
What happens to the original data in database indexing? ✔✔It is copied to the index.
Why are indexes created in a physical database design? ✔✔To retrieve data directly using a
pointer.
Already Passed
What is a broad definition of data? ✔✔Raw facts that are captured on printed or digital media
What are data? ✔✔Facts that are collected and stored in a database system
What is a determining characteristic of unstructured data? ✔✔It does not follow a data model.
Which is true about flat files? ✔✔They contain no internal hierarchical organization.
Which technology has no internal hierarchy? ✔✔Flat files
How were data retrieved before database management systems? ✔✔Sequentially from simple files
In which two ways does a database management system environment increase effectiveness in
working with data? ✔✔- 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? ✔✔Entity types
Which classification is correct for the box marked "Quantity" in the given entity-relationship
diagram? ✔✔Intersection data
Which data classification is an entity? ✔✔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? ✔✔Many-to-many
Which three kinds of rules for referential integrity are provided by modern relational database
management systems? ✔✔Insert, Delete, Update
What is an important aspect of "referential integrity"? ✔✔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? ✔✔Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? ✔✔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? ✔✔A domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? ✔✔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? ✔✔Candidate key
What happens to the original data in database indexing? ✔✔It is copied to the index.
Why are indexes created in a physical database design? ✔✔To retrieve data directly using a
pointer.
