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EMC E20-007 Exam Dumps

Vendor: EMC
Exam Code: E20-007
Exam Name: Data Science and Big Data Analytics
Certification: EMC Certifications
Total Questions: 198 Q&A
Updated on: Jan 15, 2025
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E20-007 Online Practice Questions and Answers

Questions 1

When would you use GROUP BY ROLLUP clause in your OLAP query?

A. where all subtotals and grand totals are to be included in the output

B. where only the subtotals are to be included in the output

C. where only the grand totals are to be included in the output

D. where only specific subtotals and grand totals for a combination of variables are to be included in the output

Show Answer

Questions 2

Refer to the exhibit.

You have scored your Naive bayesian classifier model on a hold out test data for cross validation and

determined the way the samples scored and tabulated them as shown in the exhibit.

What are the the False Positive Rate (FPR) and the False Negative Rate (FNR) of the model?

A. FPR = 15/262 FNR = 26/288

B. FPR = 26/288 FNR = 15/262

C. FPR = 262/15 FNR = 288/26

D. FPR = 288/26 FNR = 262/15

Show Answer

Questions 3

Refer to the exhibit.

Click on the calculator icon in the upper left corner. An analyst is searching a corpus of documents for the topic "solid state disk". In the Exhibit, Table A provides the inverse document frequency for each term across the corpus. Table B provides each term's frequency in four documents selected from corpus. Which of the four documents is most relevant to the analyst's search?

A. Document C

B. Document A

C. Document B

D. Document D

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