Question

Chapter #4

Question #12. What is IVR? How is it used to query a database?

Question #14. What is master data management? What is data steward? What is the role of master data management in an organization’s integration strategy?

Question #16. What are examples of internal sources of data for a data warehouse? What are examples of external sources of data for a data warehouse?

Question #18. What is big data? What are the defining features of big data?

Answer 1

12. The answer is:

IVR: The IVR assists the user through a series of pre-programmed prompts. These prompts are pre-recorded and can also further direct the caller to a live customer service representative.

In some cases, it may be forwarded to a voicemail box or even a message from the customer recorded and emailed to the customer service team.

• IVRs are used by small and large businesses to reduce their labor costs by using automated systems to answer the routine queries by customers.
• It can also be designed to recognize human voice and respond accordingly.
• IVRs can be used for bookings and credit card transactions as well.

14. The answer is:

Master Data Management (MDM) is a comprehensive method of enabling an enterprise to link all of its critical data to one file, called master file which provides a common point of reference.

Data Steward is a person responsible for the management and fitness of data elements ( both the content and metadata).

Role of MDM in an organization's integration strategy:

• The integration layer is a key component for the different data integration processes, like EAI/ETL and messaging.
• Integration supports standard messaging formats across multiple protocols as well, like workflow management, cross-referencing, and data sharing.

16. The answer is:

Internal sources of data:

• Most of the companies collect data from several resources such as past transactions, clicks, shipments and more.
• The data scientist will transform this data into business intelligence and then into actionable results.

External sources of data:

• External data records gathered by some external resources like supermarket, medicine store, clothing store etc. based on the requirement.
• It will also collect the data from random articles and reports that are available in internet.

18. The answer is:

Big Data refers to collections of data that are so enormous in size, varied in content and fast to accumulate that they are difficult to store and analyze using traditional approaches.

Defining features:

• Volume
• Velocity
• Variety