Free EMC D-DS-FN-23 Exam Dumps Questions & Answers

Refer to the Exhibit.

You are working on creating an OLAP query that outputs several rows of with summary rows of subtotals and grand totals in addition to regular rows that may contain NULL as shown in the exhibit.
Which function can you use in your query to distinguish the row from a regular row to a subtotal row?

• A.  GROUP_ID
• B.  RANK
• C.  GROUPING
• D.  ROLLUP

The graphic shows the values for the input Boolean attributes "A", "B", and "C". In addition, the graphic shows the values for the output attribute "class".

Which Decision Tree is valid for the data?

• A.  Tree C
• B.  Tree B
• C.  Tree D
• D.  Tree A

What are three built-in data types in the R programming language?

• A.  Boolean, table, and character
• B.  Boolean, table, and integer
• C.  Boolean, integer, and character
• D.  List, array, and integer

You have created a Logistic Regression model to predict customer churn for your company. The company's Marketing department wants to use your model to identify at-risk customers and offer incentives to keep them from leaving.

Using two different thresholds for the model provides the two confusion matrices shown in the graphic.
Marketing understands the relative costs of missing at-risk customers versus offering incentives to customers who are not at risk. Therefore, you need their advice on how to set the appropriate threshold on the churn model.
You are meeting with the Marketing team. In the meeting, you plan to state: "Raising the threshold from 0.5 to 0.75 reduces the number of unnecessary incentives that can be offered, at the cost of missing more of the customers who churned." What is the most appropriate visual to reinforce this statement?

• A. 
• B. 
• C. 
• D. 

What is a recommended use case for regular expressions?

• A.  Logistic regression
• B.  In-database text analysis
• C.  Linear regression
• D.  Decision trees