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