What should you use?

Note: This question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.
You need to calculate a measure of central tendency and variability for the variables in a dataset that is grouped by using another categorical variable.
What should you use?
A. the Describe package
B. the rxHistogram function
C. the rxSummary function
D. the rxQuantile function
E. the rxCube function
F. the summary function
G. the rxCrossTabs function
H. the ggplot2 package

Answer: C

What should you use?

Note: This question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.
You need to get all of the deciles for a variable in a data frame.
What should you use?
A. the Describe package
B. the rxHistogram function
C. the rxSummary function
D. the rxQuantile function
E. the rxCube function
F. the summary function
G. the rxCrossTabs function
H. the ggplot2 package

Answer: F

What is an alternative method to validate the model?

You have one class support vector machines (SVMs).
You have a large dataset, but you do not have enough training time to fully test the model.
What is an alternative method to validate the model?
A.Use Principal Components Analysis (PCA) Based Anomaly detection
B.Replace the SVMs with two class SVMs.
C.Perform feature selection.
D.Use outlier detection.

Answer: A

How should you transfer the data from the Oracle database?

You plan to read data from an Oracle database table and to store the data in the file system for later processing by dplyrXdf, The size of the data is larger than the memory on the server to used for modelling.
You need to ensure that the data can be processed by dplyrXdf in the least amount of time possible.
How should you transfer the data from the Oracle database?
A.Define a data source to the Oracle database server by using RxOdbcData. Use rxlmport to save the data to a comma separated values (CSV) file.
B.Use the RODBC library, connect to the Oracle database server by using odbcConnect. and then use rxDataStep to export the data to a comma-separated values (CSV) file.
C.Define a data source to the Oracle database server by using RxOdbcData, and then use rxlmport to save the data to an XDF file.
D.Use the RODBC library, connect to the Oracle database server by using odbcConnect. and then use rxSplit to save the data to multiple comma-separated values (CSV) files.

Answer: C

Which function should insert at line 02?

You are running a parallel function that uses the following R code segment. (Line numbers are included for reference only.)

image002 - 
Which function should insert at line 02?
You need to complete the R code. The solution must support chunking.
Which function should insert at line 02?
A.rxBTrees
B.rxExec
C.rxDForest
D.rxDTree

Answer: C

What should you use?

Note: This Question is part of a series of Questions that use the same or similar answer choices. An answer choice may be correct than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.
You have a dataset that contains the physical characteristics of people.
You need to visualize a relationship between height and weight for a subset of observations in the dataset.
What should you use?
A.the Describe package
B.the rxHistogram function
C.the rxSummary function
D.the rxQuantile function
E.the rxCube function
F.the summary function
G.the rxCrossTabs function
H.the ggplot2 package

Answer: E

Does this meet the goal?

1.Note: This question is part of a series of Questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, whale others might not have a correct solution-After you answer a question in this section, you will NOT be able to return to it- As a result, these questions will not appear in the review screen.
You use dplyrXdf. and you discover that after you exit the session, the output files that were created were deleted. You need to prevent the files from being deleted.
Solution: You use rxSetComputeContext with the local parameter before performing operations that save results.
Does this meet the goal?
A. Yes
B. No

Answer: B

Which function determines the variable?

Note: This question is part of a series of questions that use the same scenario. For your convenience, the scenario is repeated in each question. Each question presents a different goal and answer choices, but the text of the scenario is exactly the same in each question in this series.
Start of repeated scenario
You are developing a Microsoft R Open solution that will leverage the computing power of the database server for some of your datasets.
You are performing feature engineering and data preparation for the datasets.
The following is a sample of the dataset.

image023 - 
Which function determines the variable?
End of repeated scenario
You have the following R code.

image024 - 
Which function determines the variable?
Which function determines the variable?
A. transformVars
B. rxXdfToDataFrame
C. createRandomSample
D. transformFunc

Answer: A

Which function should you use?

Note: This question Is part of a series of questions that use the same or similar answer choice. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series.
Information and details provided In a question apply only to that question.
You need to evaluate the significance of coefficient that are produced by using a model that was estimated already.
Which function should you use?
A. rxPredict
B. rxLogit
C. Summary
D. rxLinMod
E. rxTweedie
F. stepAic
G. rxTransform
H. rxDataStep

Answer: D
Explanation:
https://docs.microsoft.com/en-us/r-server/r/how-to-revoscaler-linear-model

Which function should you use?

Note: This question Is part of a series of questions that use the same or similar answer choice. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series.
Information and details provided In a question apply only to that question.
You need to estimate a model where the outcome variable is continuous, is in the range of [0,inf], and has a substantial mass at an exact value of 0.
Which function should you use?
A. rxPredict
B. rxLogit
C. Summary
D. rxLinMod
E. rxTweedie
F. stepAic
G. rxTransform
H. rxDataStep

Answer: H