EMC DEA-7TT2 TEST STUDY GUIDE | DEA-7TT2 BRAINDUMP FREE

EMC DEA-7TT2 Test Study Guide | DEA-7TT2 Braindump Free

EMC DEA-7TT2 Test Study Guide | DEA-7TT2 Braindump Free

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Tags: DEA-7TT2 Test Study Guide, DEA-7TT2 Braindump Free, DEA-7TT2 New Study Materials, Download DEA-7TT2 Demo, DEA-7TT2 Prep Guide

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EMC DEA-7TT2 Exam is a two-hour technical exam that consists of 60 multiple-choice questions. DEA-7TT2 exam covers a wide range of topics such as data analytics, big data technologies, and data visualization. To pass the exam, candidates must have a strong understanding of statistical analysis, data mining, and machine learning algorithms. Moreover, they should be familiar with big data tools and technologies such as Hadoop, MapReduce, and Hive. Associate - Data Science and Big Data Analytics v2 Exam certification is ideal for those seeking an entry-level position in data science or big data analytics.

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EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q103-Q108):

NEW QUESTION # 103
When is the GROUP BY ROLLUP clause used in an OLAP query?
Response:

  • A. Specific subtotals and grand totals for a combination of variables are only to be included in the output
  • B. Grand totals are only to be included in the output
  • C. Subtotals are only to be included in the output
  • D. All subtotals and grand totals are to be included in the output

Answer: D


NEW QUESTION # 104
A study was run to identify general dietary patterns among the residents of a small town. Twelve thousand people were surveyed and the data was subject to K-means clustering. In one of the iterations, there were six clusters formed with 38, 1560, 1799, 2560, 2893, and 3150 respondents.
What should be the next step in identifying optimal clusters?
Response:

  • A. Multiply each variable by its standard deviation
  • B. Increase the number of clusters to see if the last cluster gets combined
  • C. Remove 38 respondents because the 5 clusters seem to be well distributed
  • D. Decrease the number of clusters to see if the last cluster gets combined

Answer: D


NEW QUESTION # 105
Refer to the exhibit.

You have created a density plot of purchase amounts from a retail website as shown. What should you do next?
Response:

  • A. Use the rug() function to add elements to the plot
  • B. Recreate the plot using the barplot() function
  • C. Recreate the density plot using a log normal distribution of the purchase amount data
  • D. Reduce the sample size of the purchase amount data used to create the plot

Answer: C


NEW QUESTION # 106

You have run a Linear Regression model on the data shown in the graphic. Which value is a reasonable guess for R-squared?
Response:

  • A. 1.25
  • B. -.8
  • C. .25
  • D. .8

Answer: D


NEW QUESTION # 107
What is an appropriate data visualization to use in a presentation to a project sponsor?
Response:

  • A. Density Plot
  • B. Box and Whisker Plot
  • C. Pie Chart
  • D. Bar Chart

Answer: D


NEW QUESTION # 108
......

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