Dell EMC Data Science and BigData Certification Questions and Answers

Question : 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?

1. Document A
2. Document C
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4. Document D



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Question : Refer to the exhibit.
What provides the decision tree for predicting whether or not someone is a good or bad credit risk.
What would be the assigned probability, p(good), of a single male with no known savings?


1. 0.83
2. 0
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4. 0.6



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Question : Refer to the exhibit.
The exhibit shows four graphs labeled as Fig A thorough Fig D. Which figure represents the
entropy function relative to a Boolean classification and is represented by the formula shown in
Exhibit?


1. A
2. B
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4. D



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Related Questions

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Question : What is an appropriate data visualization to use in a presentation for a project sponsor?


1. Box and Whisker plot
2. Pie chart
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4. Density plot


Question : In a Student's t-test, what is the meaning of the p-value?


1. it is the "power" of the Student's t-test
2. it is the mean of the distribution for the null hypothesis
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4. it is the area under the appropriate tails of the Student's distribution



Question : In addition to less data movement and the ability to use larger datasets in calculations, what is a
benefit of analytical calculations in a database?


1. improved connections between disparate data sources
2. more efficient handling of categorical values
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4. full use of data aggregation functionality




Question : You have been assigned to do a study of the daily revenue effect of a pricing model of online
transactions. When have you completed the analytics lifecycle?


1. You have a completely developed model based on both a sample of the data and the entire set
of data available.
2. You have presented the results of the model to both the internal analytics team and the
business owner of the project.
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results
4. You have written documentation, and the code has been handed off to the Data Base
Administrator and business operations.





Question : Consider these itemsets:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (gloves -> hat)?

1. 75%
2. 60%
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4. 80%


Question : What is holdout data?


1. a subset of the provided data set selected at random and used to initially construct the model
2. a subset of the provided data set that is removed by the data scientist because it contains data errors
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4. a subset of the provided data set selected at random and used to validate the model