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BCOR 2020 EXAM 2 Questions and Correct Answers 2024/2025 | Graded A+
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BCOR 2020 EXAM 2 Questions and Correct Answers 2024/2025 | Graded A+
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BCOR 2020 EXAM 2What are what-if models? - ANSwhat if models are spreadsheets used for decision making;
mathematical and logic based models
Building good spreadsheet models - ANSinfluence diagrams; building a mathematical model;
spread sheet design and implementing the model in a spreadsheet
Data - ANSraw facts; numbers, letters, etc; audio video, image
Information - ANSa collection of data organized in such a away that they have value beyond the
facts themselves
Knowledge - ANSawareness and understanding of a set of information and the ways it can be
made useful to support a task
Value of information - ANSthe value of information is directly linked to how decision makers
achieve organizational needs
Characteristics of Quality information - ANSinformation should be accurate or complete
What is IS? - ANSan information system is a single set of hardware, software, databases,
networks, people and procedure that collect, manipulate, store, and process data into
information
What are the three types of information systems - ANS- Personal IS
- Group IS
- Enterprise IS
Value Chains - ANSA series of activities that an organization performs to turn inputs into outputs
Supply Chain - ANSkey value chain in a manufacturing organization
What is a database? - ANSan organized collection of data
What does DBMS stand for? - ANSDBMS stands for data base management system
What is DBMS? - ANSa group of programs that manipulate the database and provide an
interface between the database and its users and other application processes
Hierarchy of data - ANSbit -> byte/characteristic -> field -> record -> file
, byte - ANSmade up of 8 bits
field - ANSname, number, or combination of characters that describes an aspect of a business
object or activity
record - ANSa collection of related data fields
file - ANSa collection of related records
Data entities - ANSa person, place, or thing for which data is collected, stored, and maintained
Attributes - ANSa characteristic of an entity
Keys - ANSa field or set of fields that uniquely identifies the record
Data Item - ANSthe specific value of an attribute
The database approach - ANSinformation systems share a pool of related data, offers the ability
to share data and information resources, a database management system is required
Data modeling - ANSa diagram of data entities and their relationships
Relational database model - ANS- a simple but highly useful way to organize data into collection
of two-dimensional tables called relations;
- columns - (vertical) represents an attribute of an entity
- rows - (horizontal) represents an entity
Database administration - ANSskilled and trained information system professionals
What does the database administration do? - ANSworks with users to define their data needs,
applies database programming languages to craft a set of databases to meet those needs, tests
and evaluates databases, implements changes to improve their databases performances, &
assures that data is secure from unauthorized access
Big Data - ANSextremely large and complex data collections
Characteristics of Big Data - ANSvolume, velocity, and variety
Challenges of Big Data - ANS- how to choose what subset of the data to store
- where and how to store the data
- how to find the nuggets of data that are relevant to the decision making at hand
- how to derive value from the relevant data
- how to identify which data needs to be protected from unauthorized access
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