Real 70-773 Exam Questions 2021

NEW QUESTION 1
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

NEW QUESTION 2
You have a dataset.
You need to repeatedly split randomly the dataset so that 80 percent of the data is used as a training set and the remaining 20 percent is used as a test set.
Which method should you use?

• A. threshold
• B. binary classification
• C. imputation
• D. cross validation
• E. pruning

Answer: D

NEW QUESTION 3
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 4
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

NEW QUESTION 5
DRAG DROP
You need to set the compute context for three different target environments.
Which Statement should you use for each environment? To answer, drag the appropriate statements to the correct execution contexts. Each statement may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:

NEW QUESTION 6
You have an Apache Hadoop Hive data warehouse. RevoScaleR is not installed. You need to sort the data according to the variables in the dataset.
What should you do?

• A. Connect to the database by using an ODBC connection, and then use the rxSort function.
• B. Create a table in the ORC file format.
• C. Connect to the database by using an ODBC connection, and then use the rxDataStep function.
• D. Execute a Hive query that sorts the data, and then reads the results.

Answer: D

NEW QUESTION 7
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 8
You have cloud and on-premises resources that include Microsoft SQL Server and a big data environment in Apache Hadoop.
You have 50 billion fact records.
You need to build time series models to execute forecasting reports on the fact records. What should you use?

• A. RxSpark on the Hadoop cluster
• B. RxHadoopMR on the Hadoop cluster
• C. RxLocalseq on the SQL Server database
• D. RxLocalParallel on the SQL Server database

Answer: A

NEW QUESTION 9
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 10
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 11
You have a dataset that has a character variable. You need to create a bag of counts of n-grams. Which function should you use?

• A. featurizeText0
• B. categoricalHash0
• C. concat0
• D. selcctFeatures0
• E. categorical0

Answer: A

Explanation: featurizeText: Produces a bag of counts of sequences of consecutive words, called n-grams, from a given
corpus of text. It offers language detection, tokenization, stopwords removing, text normalization and
feature generation.

NEW QUESTION 12
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 13
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 14
You need to run a larger data tree model by using rsDForest. The model must use cross validation.
Which rxDForest option should you use?

• A. maxSurrogate
• B. maxNumBins
• C. maxDepth
• D. maxCompete
• E. xVal

Answer: E

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

NEW QUESTION 15
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 16
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 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 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