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Question ID 16218	A data scientist is given an R data frame (i.e., empdata) with the following columns: Age Salary Occupation Education Gender The scientist wants to examine only the Salary and Occupation columns for ages greater than 40. Which command extracts the appropriate rows and columns from the data frame?
Option A	empdata[empdata$Age > 40, c("Salary","Occupation")]
Option B	empdata[c("Salary","Occupation"), empdata$Age > 40]
Option C	empdata[Age > 40, ("Salary","Occupation")]
Option D	empdata[, c("Salary","Occupation")]$Age > 40
Correct Answer	A

Explanation

Question ID 16219	When creating a presentation for a technical audience, what is the main objective?
Option A	Show that you met the project goals
Option B	Show how you met the project goals
Option C	Show if the model will meet the SLA
Option D	Show the technique to be used in the production environment
Correct Answer	B

Explanation

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