MSS chapter 3

data lake.

A large storage location that can hold vast quantities of data (mostly unstructured) in its native/raw format

How does the use of cloud computing affect the scalability of a data warehouse?

Hardware resources are dynamically allocated as use increases.

SaaS (software as a service)

The Extended ASP Model,"

Six Sigma

a methodology aimed at reducing the number of defects in a business process

data warehouse (DW)

a pool of data produced to support decision making; it is also a repository of current and historical data

The three main types of data warehouses are data marts, operational ________, and

data stores

Because the recession has raised interest in low-cost open source software, it is now set to replace traditional enterprise software.

false

Bill Inmon advocates the data mart bus architecture whereas Ralph Kimball promotes the hub-and-spoke architecture, a data mart bus architecture with conformed dimensions.

false

Data warehouse administrators (DWAs) do not need strong business insight since they only handle the technical aspect of the infrastructure.

false

Data warehouses are subsets of data marts.

false

Moving the data into a data warehouse is usually the easiest part of its creation.

false

OLTP systems are designed to handle ad hoc analysis and complex queries that deal with many data items.

false

Organizations seldom devote a lot of effort to creating metadata because it is not important for the effective use of data warehouses.

false

Properly integrating data from various databases and other disparate sources is a trivial process.

false

Subject oriented databases for data warehousing are organized by detailed subjects such as disk drives, computers, and networks.

false

Two-tier data warehouse/BI infrastructures offer organizations more flexibility but cost more than three-tier ones.

false

User-initiated navigation of data through disaggregation is referred to as "drill up."

false

With the balanced scorecard approach, the entire focus is on measuring and managing specific financial goals based on the organization's strategy.

false

Which data warehouse architecture uses metadata from existing data warehouses to create a hybrid logical data warehouse comprised of data from the other warehouses?

federated architecture

All of the following are benefits of hosted data warehouses EXCEPT

greater control of data

Which data warehouse architecture uses a normalized relational warehouse that feeds multiple data marts?

hub-and-spoke

Data warehouses provide direct and indirect benefits to organizations. Which of the following is an indirect benefit of data warehouses?

improved customer service

Which kind of data warehouse is created separately from the enterprise data warehouse by a department and not reliant on it for updates?

independent data mart

Oper marts are created when operational data needs to be analyzed

multidimensionally.

A(n) ________ data store (ODS) provides a fairly recent form of customer information file.

operational

Which of the following BEST enables a data warehouse to handle complex queries and scale up to handle many more requests?

parallel processing

Most data warehouses are built using ________ database management systems to control and manage the data.

relational

Given that the size of data warehouses is expanding at an exponential rate, ________ is an important issue.

scalability

Real-time data warehousing can be used to support the highest level of decision making sophistication and power. The major feature that enables this in relation to handling the data is

speed of data transfer.

When representing data in a data warehouse, using several dimension tables that are each connected only to a fact table means you are using which warehouse structure?

star schema

Operational or transaction databases are product oriented, handling transactions that update the database. In contrast, data warehouses are

subject-oriented and nonvolatile.

A Web client that connects to a Web server, which is in turn connected to a BI application server, is reflective of a

three-tier architecture.

Online ________ is a term used for a transaction system that is primarily responsible for capturing and storing data related to day-to-day business functions such as ERP, CRM, SCM, and point of sale.

transaction processing

Because of performance and data quality issues, most experts agree that the federated architecture should supplement data warehouses, not replace them.

true

One way an operational data store differs from a data warehouse is the recency of their data.

true

The "islands of data" problem in the 1980s describes the phenomenon of unconnected data being stored in numerous locations within an organization.

true

The data warehousing maturity model consists of six stages: prenatal, infant, child, teenager, adult, and sage.

true

The hub-and-spoke data warehouse model uses a centralized warehouse feeding dependent data marts.

true

With key performance indicators, driver KPIs have a significant effect on outcome KPIs, but the reverse is not necessarily true.

true

Without middleware, different BI programs cannot easily connect to the data warehouse.

true

Why is a performance management system superior to a performance measurement system?

because measurement alone has little use without action

In which stage of extraction, transformation, and load (ETL) into a data warehouse are anomalies detected and corrected?

cleanse

Metadata

describe the structure and meaning of the data, contributing to their effective use.

When querying a dimensional database, a user went from summarized data to its underlying details. The function that served this purpose is

drill down.

Which approach to data warehouse integration focuses more on sharing process functionality than data across systems?

enterprise application integration

Enterprise information integration (EII)

evolving tool space that promises real-time data integration from a variety of sources, such as relational databases, Web services, and multidimensional databases.