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WGU C175 OBJECTIVE ASSESSMENT PRACTICE TEST ANSWERS| IT CIS111 TEST BANK 2 2022/2023 UPDATE
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WGU C175 OBJECTIVE ASSESSMENT PRACTICE TEST ANSWERS| ITCIS111 TEST BANK 2 2022/2023 UPDATE
What is a broad definition of data? - (answer)Raw facts that are captured on printed or digital media
What are data? - (answer)Facts that are collected and stored in a database system
What is a determining characteristic of unstructured data? - (answer)It does not follow a data model.
Which is true about flat files? - (answer)They contain no internal hierarchical organization.
Which technology has no internal hierarchy? - (answer)Flat files
How were data retrieved before database management systems? - (answer)Sequentially from simple
files
In which two ways does a database management system environment increase effectiveness in working
with data? - (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? - (answer)Entity types
Which classification is correct for the box marked "Quantity" in the given entity-relationship diagram? -
(answer)Intersection data
Which data classification is an entity? - (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? - (answer)Many-to-many
, Which three kinds of rules for referential integrity are provided by modern relational database
management systems? - (answer)Insert, Delete, Update
What is an important aspect of "referential integrity"? - (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? - (answer)Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? - (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? - (answer)A domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? - (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? - (answer)Candidate key
What happens to the original data in database indexing? - (answer)It is copied to the index.
Why are indexes created in a physical database design? - (answer)To retrieve data directly using a
pointer.
Why is an index created on a database column? - (answer)To optimize data retrievals
Refer to the given SQL statement.
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