Dell EMC Data Science and BigData Certification Questions and Answers

Question : Refer to the exhibit.
In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also
in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan,
and the blue represents borrowers that are known to have defaulted on their loan.
Which analytical method could produce the probabilities needed to build this exhibit?


1. Linear Regression
2. Logistic Regression
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4. Association Rules



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Question : Refer to the exhibit.
You have created a density plot of purchase
amounts from a retail website as shown. What should
you do next?

1. Recreate the plot using the barplot() function
2. Use the rug() function to add elements to the plot
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4. Reduce the sample size of the purchase amount data used to create the plot



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Question : Refer to the exhibit.
You are building a decision tree. In this exhibit, four variables are listed with their respective values
of info-gain.
Based on this information, on which attribute would you expect the next split to be in the decision
tree?



1. Credit Score
2. Age
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4. Gender



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Related Questions

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Question : In data visualization, what is used to focus the audience on a key part of a chart?

1. Detailed text
2. Emphasis colors
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4. A data table




Question : Which word or phrase completes the statement? Data-ink ratio is to data visualization as
__________ .



1. Confusion matrix is to classifier
2. Data scientist is to big data
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4. K-means is to Naive Bayes



Question : Consider a database with transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has
a confidence at least 50%?


1. {soda} => {milk}
2. {milk} => {soda}
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4. {cheese} => {bread}



Question : You are using the Apriori algorithm to determine the likelihood that a person who owns a home
has a good credit score. You have determined that the confidence for the rules used in the
algorithm is > 75%. You calculate lift = 1.011 for the rule, "People with good credit are
homeowners". What can you determine from the lift calculation?



1. Support for the association is low
2. Leverage of the rules is low
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4. The rule is true




Question : What is an appropriate data visualization to use in a presentation for an analyst audience?


1. Pie chart
2. ROC curve
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4. Stacked bar chart



Question : Consider a database with transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
The minimum support is 25%. Which rule has a confidence equal to 50%?


1. {bread} => {milk}
2. {bread, milk} => {cheese}
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4. {bread} => {cheese}