WGU C175 PreAssessment QUESTIONS AND ANSWERS 100 VERIFIED A GUARANTEED
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Course
NU1426
Institution
NU1426
WGU C175 Pre-Assessment QUESTIONS AND ANSWERS 100% VERIFIED A+ GUARANTEED
What is a broad definition of data?
What are data?
What is a determining characteristic of unstructured data?
Which is true about flat files?
Which technology has no internal hierarchy?
How were data retrieved before da...
WGU C175 Pre-Assessment QUESTIONS AND
ANSWERS 100% VERIFIED A+ GUARANTEED
1). What is a broad definition of data?
Ans: Raw facts that are captured on printed or digital media
2). What are data?
Ans: Facts that are collected and stored in a database system
3). What is a determining characteristic of unstructured data?
Ans: It does not follow a data model.
4). Which is true about flat files?
Ans: They contain no internal hierarchical organization.
5). Which technology has no internal hierarchy?
Ans: Flat files
6). How were data retrieved before database management systems?
Ans: Sequentially from simple files
7). In which two ways does a database management system environment increase
effectiveness in working with data?
Ans: - It enables data sharing,
- It permits storage of vast volumes of data.
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, 8). What is the uniquely identifiable element about which data can be categorized in an entity-
relationship diagram?
Ans: Entity types
9). Which classification is correct for the box marked "quantity" in the given entity-relationship
diagram?
Ans: Intersection data
10). Which data classification is an entity?
Ans: Event
11). 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?
Ans: Many-to-many
12). Which three kinds of rules for referential integrity are provided by modern relational
database management systems?
Ans: Insert, Delete, Update
13). What is an important aspect of "referential integrity"?
Ans: Reference to data in one relation is based on values in another relation.
14). 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?
Ans: Customer names
15). What is an attribute or group of attributes that uniquely identify a tuple in a relation?
Ans: Primary key
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