All Of The Following Statements About Mapreduce Are True Except

Question: In the opening vignette, the CERN Data Aggregation System (DAS), built on MongoDB (a Big Data management infrastructure), used relational database technology.

Answer: f

Question: In the Luxottica case study, outsourcing enhanced the ability of the company to gain insights into their data.

Answer: f

Question: MapReduce can be easily understood by skilled programmers due to its procedural nature.

Answer: t

Question: In the Dublin City Council case study, GPS data from the city’s buses and CCTV were the only data sources for the Big Data GIS-based application.

Answer: f

Question: Big Data simplifies data governance issues, especially for global firms.

Answer: f

Question: In the Luxottica case study, what technique did the company use to gain visibility into its customers?

a) visibility analytics

b) data integration

c) focus on growth

d) customer focus

Answer: b

Question: Allowing Big Data to be processed in memory and distributed across a dedicated set of nodes can solve complex problems in near-real time with highly accurate insights. What is this process called?

a) in-memory analytics

b) in-database analytics

c) grid computing

d) appliances

Answer: a

Question: Which Big Data approach promotes efficiency, lower cost, and better performance by processing jobs in a shared, centrally managed pool of IT resources?

a) in-memory analytics

b) in-database analytics

c) grid computing

d) appliances

Answer: c

Question: In a Hadoop “stack,” what is a slave node?

a) a node where bits of programs are stored

b) a node where metadata is stored and used to organize data processing

c) a node where data is stored and processed

d) a node responsible for holding all the source programs

Answer: c

Question: In a Hadoop “stack,” what node periodically replicates and stores data from the Name Node should it fail?

a) backup node

b) secondary node

c) substitute node

d) slave node

Answer: b