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Flashcards by Miguel Lucero, updated more than 1 year ago
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Created by Miguel Lucero
about 8 years ago
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| Question | Answer |
| 1. Much ambiguity exists in defining Big Data. a. True b. False | ANSWER: True |
| 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 | ANSWER: False |
| 3. Scaling out is keeping the same number of systems, but migrating each system to a larger one. a. True b. False | ANSWER: False |
| 4. In many ways, the issues of associated with volume and velocity are the same. a. True b. False | ANSWER: True |
| 5. The analysis of data to produce actionable results is feedback loop processing. a. True b. False | ANSWER: True |
| 6. Relational databases rely on unstructured data. a. True b. False | ANSWER: False |
| 7. One tenet of Big Data is that all data that is capable of being captured should be. a. True b. False | ANSWER: False |
| 8. The ability to graphically data in a way that makes it understandable is the concept of value. a. True b. False | ANSWER: False |
| 9. Characteristics that are important in working with data in the relational database model also apply to Big Data. a. True b. False | ANSWER: True |
| 10. Hadoop is a database that has become the de facto standard for most Big Data storage and processing. a. True b. False | ANSWER: False |
| 11. Under the HDFS system, using a write-one, ready-many model simplifies concurrency issues. a. True b. False | ANSWER: True |
| 12. A block report is used to let the name node know that the data mode is still available. a. True b. False | ANSWER: 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 | ANSWER: True |
| 14. Hive is a good choice for jobs that require a small subset of data to be returned very quickly. a. True b. False | ANSWER: False |
| 15. Hadoop is a high-level tool that requires little effort to create, manage and use. a. True b. False | ANSWER: False |
| 16. Flume is a tool for converting data back and forth between a relational database and the HDFS. a. True b. False | ANSWER: False |
| 17. Most NoSQL products run only in a Linux or Unix environment. a. True b. False | ANSWER: True |
| 18. Key-value and document databases are structurally similar. a. True b. False | ANSWER: True |
| 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 | ANSWER: True |
| 20. Interest in graph databases can be tied to the area of social networks. a. True b. False | ANSWER: True |
| 21. Explanatory analytics uses predictive analytics as a stepping stone to create explanatory models. a. True b. False | ANSWER: False |
| 22. Data mining focuses on the discovery and explanation stages of knowledge acquisition. a. True b. False | ANSWER: True |
| 23. _ _ is NOT one of the “3 Vs” of Big Data. a. Volume b. Velocity c. Validation d. Variety | c. Validation |
| 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 | b. Scaling up |
| 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 | c. Stream processing |
| 26. A(n) __ is a process or set of operations in a calculation. a. algorithm b. feedback loop c. stream d. structure | a. algorithm |
| 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 | b. captures data in whatever format it naturally exists |
| 28. In the context of Big Data, _____ relates to differences in meaning. a. variety b. variability c. veracity d. viability | b. variability |
| 29. In the context of Big Data, _____ refers to the trustworthiness of a set of data. a. value b. variability c. veracity d. viability | c. veracity |
| 30. By default, Hadoop uses a replication factor of: a. one b. two c. three d. four | c. three |
| 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 | b. Write-many, read-once |
| 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 | a. client, name |
| 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 | b. 3 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 | b. map |
| 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 | b. 100 or less |
| 36. processing occurs when a program runs from beginning to end without any user interaction. a. Hadoop b. Block c. Hive d. Batch | 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 | b. Pig |
| 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 | c. Sqoop |
| 39. ___ was the first SQL-on-Hadoop application. a. Flume b. Pig c. Sqoop d. Impala | 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 | 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 | b. fetch |
| 42. Document databases group documents into logical groups called: a. buckets b. sets c. collections d. blocks | c. collections |
| 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 | b. Row-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 | 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 | a. Explanatory analytics |
| 46. uses statistical tools to answer questions about future data occurrences. a. Explanatory analytics b. Data mining c. Predictive analytics d. Knowledge acquisition | c. Predictive analytics |
| 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 | b. data analysis and classification |
| 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 | a. guided |
| 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 | c. predictive analytics |
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