QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ||ALREADY
GRADED A+||NEWEST VERSION
Quiz: structured information
Ans: usually considered to be facts and data
it is reasonably orderly, and can be broken down into component parts and
organized into hierarchies
Quiz: unstructured information
Ans: has no inherent structure or order, and the parts can't be easily linked
together
it is more difficult to break down, categorize, organize, and query
Quiz: metadata
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, Ans: data about data
clarifies the nature of the information
for structured information, it describes the definitions for each field, table and
their relationships
for unstructured or semi-structured info it describes properties of a document
or other resource
Quiz: five advantages of databases
Ans: 1. reduce redundancy
2. increase information quality
3. flexibility
4. increase information security
5. scalability
Quiz: relational integrity constraint
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, Ans: rule that enforces basic and fundamental information-based constraints
(ensure accuracy and consistency of data)
Quiz: business-critical integrity constraint
Ans: rule that enforce business rules vital to an organization's success and
often require more insight and knowledge than relational integrity constraints
Quiz: password
Ans: provides authentication of the user
Quiz: access level
Ans: determines who has access to the different types of information
Quiz: access control
Ans: determines types of user access, such as read-only access
Quiz: entity
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, Ans: object, concept or event (subject)
ex. Customer
Quiz: attributes
Ans: a characteristic of an entity
ex. Customer ID, Customer Name, Contact Name, Phone #
Quiz: record
Ans: the specific characteristics of one entity also called a row or tuple
ex. 314-882-2409 or David Logan
A representation of an entity in a meaningful way, which includes the attributes
of the entity, is called a ________.
Quiz: table
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