NEW QUESTION 1
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

NEW QUESTION 2
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 remove all instances of the file.remove method.
Does this meet the goal?

• A. Yes
• B. No

Answer: B

NEW QUESTION 3
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

NEW QUESTION 4
You have a Microsoft SQI Server instance that has R Services (In Database) installed. The server has a comma separated values (CSV) file stored in the local file system.
For analytic purposes, you need to read the CSV file into a database table in the SQL Server instance.
You connect to the SQL Server instance by using SQL Server Management Studio.
What should you use from sp_execute_external_script?

• A. RxSqIServerData and specify the CSV file path in the connecting string.
• B. rxDataStep and specify the CSV lite path as the inFile argument
• C. rxImportToXdf and specify the CSV file as the input
• D. read.csv and specify the CSV file path as the parameter.

Answer: D

NEW QUESTION 5
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

NEW QUESTION 6
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

NEW QUESTION 7
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 dplyrXdf with the outFile parameter and specify a path other than the working directory for dplyrXdf.
Does this meet the goal?

• A. Yes
• B. No

Answer: A

NEW QUESTION 8
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. Use the RODBC library, connect to the Oracle database server by using odbcConnec
• B. 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 odbcConnec
• E. and then use rxSplit to save the data to multiple comma-separated values (CSV) files.

Answer: C

NEW QUESTION 9
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.

End of repeated scenario
You have the following R code.

Which function determines the variable?

• A. transformVars
• B. rxXdfToDataFrame
• C. createRandomSample
• D. transformFunc

Answer: A

NEW QUESTION 10
You have following regression forest.

Which variable contributes the most to the dependent variable?

• A. stack.loss
• B. Water.Temp
• C. Air.Flow
• D. Acid.Conc

Answer: A

NEW QUESTION 11
You have a slow Map Reduce job.
You need to optimize the job to control the number of mapper and runner tasks. Which function should you use?

• A. RxComputeContext
• B. RxHadoopMR
• C. rxExec
• D. RxLocalParallel

Answer: B

NEW QUESTION 12
HOTSPOT
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.

End of repeated scenario
You need to sort the data from the dataset sample and to remove duplicates by using wkswork1.
Which R code segment should you use? to answer, select the appropriate options in the
answer area.
Note: Each correct selection is worth one point.

Answer:

Explanation:

NEW QUESTION 13
You are running a large logistic regression for 1,000 feature variables by using the logisticRegression0 function in the MicrosoftML package. All of the predictor variables are numeric.
Currently, you specify the input variables separately by using the following formula.

You discover that it takes 20 minutes to estimate each model.
You need to reduce the amount of time required to estimate each model without losing any information in the predictors.
What should you do?

• A. Use stepControl0 to perform stepwise regression to limit the number of variables that contribute to the model.
• B. Use selectFeatures0 to select the features that provide the most information about the outcome variable.
• C. Use princomp0 on the correlation matrix of Features, and then use only the first 100 principle components to reduce the number of input variables.
• D. Use concat0 to create a single array variable named Features, and then specify a newformula named Outcome - Features.

Answer: B

NEW QUESTION 14
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.

End of repeated scenario
You need to analyze the dataset without the missing values. The solution must not remove the missing values from the dataset.
Which R code segment should you use?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: A

NEW QUESTION 15
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 dplyrXdf with the persist verb.
Does this meet the goal?

• A. Yes
• B. No

Answer: A

NEW QUESTION 16
You are planning the compute contexts for your environment. You need to execute rx-function calls in parallel.
What are three possible compute contexts that you can use to achieve this goal? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.

• A. local parallel
• B. Spark
• C. local sequential
• D. Map Reduce
• E. SQL

Answer: ABC

Explanation: https://docs.microsoft.com/en-us/azure/hdinsight/hdinsight-hadoop-r-server-compute-contexts

NEW QUESTION 17
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 build a model that uses xyz regression.
You need to estimate a model that predicts a binary variable.
Which function should you use?

• A. rxPredict
• B. rxLogit
• C. Summary
• D. rxLinMod
• E. rxTweedie
• F. stepAic
• G. rxTransform
• H. rxDataStep

Answer: B

Explanation: https://docs.microsoft.com/en-us/r-server/r/how-to-revoscaler-logistic- regression