CH 5 MIS 301

Describe the characteristics of Big Data.

1. Volume: the incredibly large volume that Big Data entails is so much more than other kinds of data and characterizes Big Data 2. Velocity: the rate at which information flows into organizations is rapidly increasing and this also distinguishes Big Data from other kinds of data 3. Variety: the formats of other data typically change slowly but Big Data formats are less structured and change rapidly depending on the data

What are some of the difficulties involved in managing data?

1. they are scattered throughout organizations and are collected by various people through various methods/ devices 2. they come from multiple sources 3. information systems impose certain requirements on data leading to repetition and conflicts across an organization.

Corporate databases are an example of a(n) _________ source of data. A. Internal B. Clickstream C. External D. Personal

A. Internal

Nonvolatile in the context of data storage means ________________. A. The data can only be changed by IT professionals. B. The data can't be changed in the source system. C. The data can only be changed by users. D. The data can't be changed in a data warehouse.

A. The data can only be changed by IT professionals.

___________ is NOT a challenge of KMS. A. Utilizing the knowledge B. Being willing to invest resources C. Getting employees to share information D. Maintaining and updating the knowledge

A. Utilizing the knowledge

Which of the following is the correct order of the data hierarchy, from smallest to largest? A. bit, byte, field, record, file, database B. byte, bit, field, record, file, database C. bit, byte, field, file, record, database D. byte, bit, field, file, record, database

A. bit, byte, field, record, file, database

Big Data helps companies treat customers as individuals. This is called __________. A. microsegmentation B. data analyzation C. experimentation D. business model creation

A. microsegmentation

__________________________ is an approach to managing information across an entire organization. A. Master data B. Data governance C. Master data management D. Big Data

B. Data governance

____________ is one form of data integration. A. SQL B. ETL C. SAP D. EDI

B. ETL

If your sales team shows a customer's name is "Johnny Smith" but your shipping department says it is "John A. Smith", this is a data __________ issue. A. Isolation B. Inconsistency C. Security D. Redundancy

B. Inconsistency

Which of the following is FALSE? A. Big Data can come from untrusted sources. B. Big Data changes, especially in data streams. C. Big Data is valuable because it is structured. D. Big Data is often inaccurate, incomplete, incorrect, or erroneous.

C. Big Data is valuable because it is structured.

Information ______________ utilize information created by others. A. Users B. Creators C. Consumers D. Producers

C. Consumers

You've been working at ABC Corp for 20 years. Even though they say they are an Equal Opportunity Employer, you know they prefer to hire people who personally know someone at the company. This is _________. A. Information B. Data C. Tacit knowledge D. Explicit knowledge

C. Tacit knowledge

There are 3 distinct characteristics of Big Data. The collection of social network data is an example of __________. A. Vintage B. Volume C. Variety D. Velocity

C. Variety

A __________________________ defines the required format for entering the data into the database A. DBMS B. entity C. data dictionary D. primary key

C. data dictionary

Data are scattered throughout organizations. An example of this is ________________. A. media changing (cassette to CD) B. data hoarding C. human vs. computer languages D. customers moving

C. human vs. computer languages

Describe how companies can use Big Data to gain competitive advantage.

Companies can use Big Data to gain competitive advantage by predicting the actions of individuals before they realize that they will act in that way. The companies can then market to them in ways that seem natural but are actually targeted specifically for those individuals which would drive in more customers than those companies who don't utilize Big Data.

__________________ are/is the most effective and efficient way of doing things, readily available to a wide range of employees. A. Knowledge management systems B. Intellectual capital C. Knowledge management D. Best practices

D. Best practices

Which of the following is TRUE in regard to Big Data? A. Big Data systems work because people have taught those systems to think like humans; they just work faster than humans. B. Big Data systems need human intervention to improve over time. C. Big Data refers to large amounts of traditional data. D. Big Data is about predictions.

D. Big Data is about predictions

The Sarbanes-Oxley Act of 2002 holds ______________ personally responsible for disclosing the effectiveness of their financial controls. A. CSOs B. CIOs C. COOs D. CFOs

D. CFOs

Intellectual capital is also called __________. A. Wisdom B. Information C. Data D. Knowledge

D. Knowledge

Which of the following is a good example of a primary key in a student table? A. First and Last Name B. Address C. Birthdate D. Social security number

D. Social security number

Big Data primarily deals with ______________ data. A. Semi-structured B. Structured C. Unstructured D. All of the above

D. all of the above

Which of the following is the correct order for the KMS cycle? A. create, capture, store, manage, refine, disseminate B. create, capture, refine, manage, store, disseminate C. create, capture, store, refine, manage, disseminate D. create, capture, refine, store, manage, disseminate

D. create, capture, refine, store, manage, disseminate

Your company decides to keep copies of your invoices on CDs. You decide the safest place to store them is in your company's basement since it is secure and people rarely go down there. When you get audited, you find the CDs got ruined during a recent rainstorm when the basement got flooded; you don't have access to the information for your audit. This is an example of _______. A. Data degradation B. Low data quality C. Data integrity failure D. Data rot

D. data rot

Data ___________ means all applications are able to access the same data, which is ___________ by databases. A. independence; minimized B. isolation; minimized C. isolation; maximized D. independence; maximized

D. independence; maximized

Data warehouses and data marts are __________; this means users cannot change or update the data in data warehouses or data marts. A. time variant B. organized by business dimension or subject C. integrated D. nonvolatile

D. nonvolatile

Describe the characteristics of a data warehouse.

Data warehouses have several defining characteristics. These include: They are organized by business dimension or subject, they use online analytical processing, they are integrated, they are time variant, they are nonvolatile, and they are multidimensional.

Data warehouses maintain historical data while data marts are real-time. T/F

False

NoSQL databases only allow businesses to manipulate structured data. T/F

False

When data are normalized, attributes in the table depend only on the secondary key. T/F

False

What is the difference between LANs and WANs?

LANs are local and small areas such as one building or a concentrated area whereas WANs are a large area covered and connect multiple LANs

What is a primary key? A secondary key? What is an entity? An Attribute? An Instance?

Primary key: a field in a record that is unique to that record so it can be identified, updated, and sorted Secondary key: another field that identifies a record but not necessarily unique to that record Entity: a person, place, thing, or event about which information is maintained Attribute: each characteristic or quality of a particular entity Instance: each row in a relational table which is a specific, unique representation of the entity

What is the difference between tacit knowledge and explicit knowledge?

Tacit knowledge is more historical and experiential knowledge such as trade secrets, an organizations insight or expertise, skill sets, understanding, and learning. On the other hand, explicit knowledge is more technical and rational such as the policies, procedural guides, reports, strategies, and core competencies.

Big Data predictions come from applying mathematics to huge quantities of data to infer probabilities. T/F

True

Data governance is implemented through master data management. T/F

True

Compare and contrast the three-wireline communications channels.

Twisted-Pair wire: Used for almost all business telephone wiring; inexpensive and widely available Coaxial Cable: Handles high-speed data traffic and TV signals; more expensive and less flexible/ harder to work with Fiber-Optic Cable: Transmit huge amounts of data and are more secure; inexpensive but hard to work with