Chapter 5

Question 1

What are some difficulties managing data?

Answer 1

1. Data increases exponentially
2. Data is scattered throughout organizations, collected by various methods and devices
3. Data is generated by many sources
   - Internal, Personal, External
4. Data from the web
5. Data rot: data becoming less valuable
6. Federal government regulations
7. Unstructured data

Question 2

Data governance

Answer 2

an approach to managing information across an entire organization

Question 3

Master data management

Answer 3

a process that spans all of an organization’s business processes and applications

Question 4

Master data

Answer 4

a set of core data
- used to categorize, aggregate and evaluate transactional data

Question 5

Transactional data

Answer 5

describes business activities or transactions

Question 6

Data file

Answer 6

a collection of logically related records

Question 7

Data redundancy

Answer 7

The same data stored in the same location

Question 8

Data isolation

Answer 8

Applications unable to access data in another application

Question 9

Data inconsistency

Answer 9

Data does not match each other

Question 10

Data security

Answer 10

how safe is the data

Question 11

Data integrity

Answer 11

the data meets certain constraints

Question 12

Data independence

Answer 12

All applicants can access the data

Question 13

Database management system

Answer 13

a set of programs that provide users with tools to create and manage a database

Question 14

Big data

Answer 14

the abundance of data

Question 15

name the characteristics of big data

Answer 15

diversity
- changes rapidly
high-volume
- generates large quantities of data
high velocity
- the rate at which data flows into an organization

Question 16

Name the issues with big data

Answer 16

1. The data can come from untrusted sources
2. Dirty data
   - inaccurate, incomplete, incorrect, duplicate, or erroneous data
3. The conditions of when the data is collected change constantly