TEST 1 ch 3 Data
All of the following are true about in-database processing technology EXCEPT A) it pushes the algorithms to where the data is. B) it makes the response to queries much faster than conventional databases. C) it is often used for apps like credit card fraud detection and investment risk management. D) it is the same as in-memory storage technology.
D
Data warehouses provide direct and indirect benefits to organizations. Which of the following is an indirect benefit of data warehouses? A) better and more timely information B) extensive new analyses performed by users C) simplified access to data D) improved customer service
D
In which stage of extraction, transformation, and load (ETL) into a data warehouse are anomalies detected and corrected? A) transformation B) extraction C) load D) cleanse
D
Oper marts are created when operational data needs to be analyzed A) linearly. B) in a dashboard. C) unidimensionally. D) multidimensionally.
D
When querying a dimensional database, a user went from summarized data to its underlying details. The function that served this purpose is A) dice. B) slice. C) roll-up. D) drill down.
D
Which data warehouse architecture uses metadata from existing data warehouses to create a hybrid logical data warehouse comprised of data from the other warehouses? A) independent data marts architecture B) centralized data warehouse architecture C) hub-and-spoke data warehouse architecture D) federated architecture
D
Why is a performance management system superior to a performance measurement system? A) because performance measurement systems are only in their infancy B) because measurement automatically leads to problem solution C) because performance management systems cost more D) because measurement alone has little use without action
D
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? A) star schema B) snowflake schema C) relational schema D) dimensional schema
A
How does the use of cloud computing affect the scalability of a data warehouse? A) Cloud computing vendors bring as much hardware as needed to users' offices. B) Hardware resources are dynamically allocated as use increases. C) Cloud vendors are mostly based overseas where the cost of labor is low. D) Cloud computing has little effect on a data warehouse's scalability.
B
What is Six Sigma? A) a letter in the Greek alphabet that statisticians use to measure process variability B) a methodology aimed at reducing the number of defects in a business process C) a methodology aimed at reducing the amount of variability in a business process D) a methodology aimed at measuring the amount of variability in a business process
B
Which approach to data warehouse integration focuses more on sharing process functionality than data across systems? A) extraction, transformation, and load B) enterprise application integration C) enterprise information integration D) enterprise function integration
B
Which of the following BEST enables a data warehouse to handle complex queries and scale up to handle many more requests? A) use of the Web by users as a front-end B) parallel processing C) Microsoft Windows D) a larger IT staff
B
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
The BPM development cycle is essentially a one-shot process where the requirement is to get it right the first time.
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
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
A Web client that connects to a Web server, which is in turn connected to a BI application server, is reflective of a A) one-tier architecture. B) two-tier architecture. C) three-tier architecture. D) four-tier architecture.
C
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) A) extended ASP. B) data cloud. C) data lake. D) relational database.
C
All of the following are benefits of hosted data warehouses EXCEPT A) smaller upfront investment. B) better quality hardware. C) greater control of data. D) frees up in-house systems
C
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 A) country of (data) origin. B) nature of the data. C) speed of data transfer. D) source of the data
C
Which data warehouse architecture uses a normalized relational warehouse that feeds multiple data marts? A) independent data marts architecture B) centralized data warehouse architecture C) hub-and-spoke data warehouse architecture D) federated architecture
C
Which kind of data warehouse is created separately from the enterprise data warehouse by a department and not reliant on it for updates? A) sectional data mart B) public data mart C) independent data mart D) volatile data mart
C
) ________ 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. A) Enterprise information integration (EII) B) Enterprise application integration (EAI) C) Extraction, transformation, and load (ETL) D) None of these
A
Operational or transaction databases are product oriented, handling transactions that update the database. In contrast, data warehouses are A) subject-oriented and nonvolatile. B) product-oriented and nonvolatile. C) product-oriented and volatile. D) subject-oriented and volatile.
A
