1. Much ambiguity exists in defining Big Data.
a. True
b. False

2. For a data set to be considered Big Data, it must display all the “3 Vs” – volume, velocity and variety.
a. True
b. False

3. Scaling out is keeping the same number of systems, but migrating each system to a larger one.
a. True
b. False

4. In many ways, the issues of associated with volume and velocity are the same.
a. True
b. False

5. The analysis of data to produce actionable results is feedback loop processing.
a. True
b. False

6. Relational databases rely on unstructured data.
a. True
b. False

7. One tenet of Big Data is that all data that is capable of being captured should be.
a. True
b. False

8. The ability to graphically data in a way that makes it understandable is the concept of value.
a. True
b. False

9. Characteristics that are important in working with data in the relational database model also apply to Big Data.
a. True
b. False

10. Hadoop is a database that has become the de facto standard for most Big Data storage and processing.
a. True
b. False

11. Under the HDFS system, using a write-one, ready-many model simplifies concurrency issues.
a. True
b. False

12. A block report is used to let the name node know that the data mode is still available.
a. True
b. False

13. A reduce function takes a collection of key-value pairs with the same key value and summarizes them into a single result.
a. True
b. False

14. Hive is a good choice for jobs that require a small subset of data to be returned very quickly.
a. True
b. False

15. Hadoop is a high-level tool that requires little effort to create, manage and use.
a. True
b. False

16. Flume is a tool for converting data back and forth between a relational database and the HDFS.
a. True
b. False

17. Most NoSQL products run only in a Linux or Unix environment.
a. True
b. False

18. Key-value and document databases are structurally similar.
a. True
b. False

19. A column-family database is a NoSQL database model that organizes data in key-value pairs with keys mapped to a set of columns in the value component.
a. True
b. False

20. Interest in graph databases can be tied to the area of social networks.
a. True
b. False

21. Explanatory analytics uses predictive analytics as a stepping stone to create explanatory models.
a. True
b. False

22. Data mining focuses on the discovery and explanation stages of knowledge acquisition.
a. True
b. False

23. _ _ is NOT one of the “3 Vs” of Big Data.
a. Volume b. Velocity
c. Validation d. Variety

24. _ ___ is keeping the same number of systems, but migrating each system to a larger system.
a. Clustering b. Scaling up
c. Streaming d. Scaling out

25. __ ___ focuses on filtering data as it enters the system to determine which data to keep and which to discard.
a. Scaling up
b. Feedback loop processing
c. Stream processing
d. Scaling out

26. A(n) __ is a process or set of operations in a calculation.
a. algorithm b. feedback loop
c. stream d. structure

27. Big Data:
a. relies on the use of structured data b. captures data in whatever format it naturally exists
c. relies on the use of unstructured data d. imposes a structure on data when it is captured

28. In the context of Big Data, _____ relates to differences in meaning.
a. variety b. variability
c. veracity d. viability

29. In the context of Big Data, _____ refers to the trustworthiness of a set of data.
a. value b. variability
c. veracity d. viability

30. By default, Hadoop uses a replication factor of:
a. one
b. two
c. three
d. four

31. Which of the following is NOT a key assumption of the Hadoop Distributed File System?
a. High volume
b. Write-many, read-once
c. Streaming access
d. Fault-tolerance

32. When using a HDFS, the _____ node creates new files by communicating with the ____ node.
a. client, name
b. name, client
c. client, data
d. data, client

33. When using a HDFS, a heartbeat is sent every _____ to notify the name node that the data mode is still available.
a. 3 hours b. 3 seconds
c. 6 hours d. 6 seconds

34. When using MapReduce, a _______ function takes a collection and data and sorts and filters it into a set of key-value pairs.
a. reduce b. map
c. data d. block

35. When using MapReduce, best practices suggest that the number of mappers on a given node should be:
a. 100 or more b. 100 or less
c. 50 or less d. at least 300

36. processing occurs when a program runs from beginning to end without any user interaction.
a. Hadoop b. Block
c. Hive d. Batch

37. Two of the most popular applications to simplify the process of creating MapReduce jobs are Hive and
a. Flume b. Pig
c. Sqoop d. Impala

38. ___ is a tool for converting data back and forth between a relational database and the HDFS.
a. Flume b. Pig
c. Sqoop d. Impala

39. ___ was the first SQL-on-Hadoop application.
a. Flume b. Pig
c. Sqoop d. Impala

40. Which of the following is NOT one of the standard NoSQL categories?
a. document databases
b. column-oriented databases
c. graph databases
d. chart databases

41. To query the value component of the pair when using a key-value database, use get or:
a. store b. fetch
c. retrieve d. gather

42. Document databases group documents into logical groups called:
a. buckets b. sets
c. collections d. blocks

43. ______minimizes the number of disk reads necessary to retrieve a row of data.
a. Column-oriented database
b. Row-centric storage
c. Column-family database
d. Column-centric storage

44. Modeling and storing data about relationships is the focus of:
a. key-value databases
b. column-oriented databases
c. document databases
d. graph databases

45. uses statistical analysis to answer questions about the how and why of relationships.
a. Explanatory analytics
b. Data mining
c. Predictive analytics
d. Knowledge acquisition

46. uses statistical tools to answer questions about future data occurrences.
a. Explanatory analytics
b. Data mining
c. Predictive analytics
d. Knowledge acquisition

47. The goal of the _____ phase of data mining is to identify common data characteristics or patterns.
a. data preparation
b. data analysis and classification
c. knowledge acquisition
d. prognosis

48. The end user decides what techniques to apply to the data when using the _____ mode of data mining
a. guided b. prognosis
c. directed d. automated

49. Most BI vendors are dropping the term “data mining” and replacing it with the term:
a. explanatory analytics
b. data analytics
c. predictive analytics
d. knowledge acquisition