Question 8 (2 points) During drill-down, you go from high-level summary data to detailed levels of data. True False Question 9 (2 points) Melanie's company takes a "store everything" approach to big data, saving all of it in a raw, unaltered form Only when she needs to analyze some of the data is it extracted from this a) data mart b) data warehouse c) data lake Question 10 (2 points) Marshall's company currently maintains their data on in-house servers, but his supervisor has asked him to research their options for having some or all of it hosted by a cloud service provider. Which challenge of big data is Marshall helping to address? a) where and how to store the data b) how to find the most relevant data nuggets how to choose what subset of data to store d) how to derive value from the relevant data Question 11 (2 points) Which statement regarding processing task completion using Hadoop's MapReduce program is correct? a) MapReduce employs a JobTracker residing on the master server and TaskTrackers residing on other servers. b) After processing, subsets of data are reduced back from the central node to other nodes in the cluster C) The TaskTrackers divide computing jobs up into well-defined tasks and move those to the Job Tracker d) Task Trackers ensure that only one server in the cluster operates on data at a time to maintain concurrency control