ISYS- CH 3

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

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

Cleanse

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

False

T/F- Moving the data into a data warehouse is usually the easiest part of its creation.

False

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

False

T/F- Properly integrating data from various databases and other disparate sources is a trivial process.

False

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

False

T/F- The BPM development cycle is essentially a one-shot process where the requirement is to get it right the first time.

False

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

False

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

False

T/F- With the balanced scorecard approach, the entire focus is on measuring and managing specific financial goals based on the organization's strategy.

False

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

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

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

Improved customer service

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

Parallel processing

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

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

True

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

True

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

True

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

True

What is Six Sigma?

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

A large storage location that can hold vast quantities of data (mostly unstructured) in its native/raw format for future/potential analytics consumption is referred to as a(n)

data lake

All of the following are true about in-database processing technology EXCEPT

it is the same as in-memory storage technology.

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

true

T/F-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

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

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

Enterprise information integration (EII)