EMC D-DS-FN-23 Actual Free Exam Questions & Community Discussion
You are using MADlib for Linear Regression analysis.
Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
Correct Answer: C
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Which chart type is intended to display correlations between sets of numeric data?
Correct Answer: B
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A data scientist is preparing a presentation for a meeting with the project's business sponsors. The distribution of per-sale revenue is an important finding from the analysis. The graphics illustrate four ways to plot the per-sale revenue distribution.."
Which graphic is most appropriate for the sponsor presentation?
Which graphic is most appropriate for the sponsor presentation?
Correct Answer: D
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In naïve Bayes implementations, how is the possibility of zero probabilities resulting from unobserved attribute/classifier pairs properly handled?
Correct Answer: A
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In the data preparation phase of the data analytics lifecycle, what does the term "data conditioning" refer to?
Correct Answer: D
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Which assumption makes the Naïve Bayesian classifier different from the general Bayesian model?
Correct Answer: C
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What is an appropriate data visualization to use in a presentation for an analyst audience?
Correct Answer: A
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A business colleague who is new to Hadoop approaches you with a question. The colleague wants to know the best approach to access their data. The colleague has previously worked extensively with SQLand databases.
Which query interface should be recommended?
Which query interface should be recommended?
Correct Answer: C
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Which word or phrase completes the statement? A data warehouse is to a centralized database for reporting as an analytic sandbox is to a _______?
Correct Answer: A
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Which word or phrase completes the statement? A Data Scientist would consider that a RDBMS is to a Table as R is to a ________.
Correct Answer: D
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Which word or phrase completes the statement? Theater actor is to "Artistic and Expressive" as Data Scientist is to __________
Correct Answer: A
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What are good reasons to develop a naive Bayes classifier model?
Correct Answer: C
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In a user-defined aggregate function, what is FFUNC?
Correct Answer: D
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In data visualization, which type of chart is recommended to represent frequency data?
Correct Answer: A
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Which two tools support query languages that can be used with Hadoop?
Correct Answer: C
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