EMC E20-026 Online Practice Questions and Exam Preparation

EMC E20-026 Online Questions & Answers

• Question 121:

  Assume that you have a data frame in R. Which function would you use to display descriptive statistics about this variable?

  A. summary
  B. str
  C. attributes
  D. levels
  A. summary

• Question 122:

  When creating a presentation for a technical audience, what is the main objective?

  A. Show that you met the project goals
  B. Show how you met the project goals
  C. Show if the model will meet the SLA
  D. Show the technique to be used in the production environment
  B. Show how you met the project goals

• Question 123:

  Refer to the exhibit.

  You are building a decision tree. In this exhibit, four variables are listed with their respective values of info- gain.

  Based on this information, on which attribute would you expect the next split to be in the decision tree?

  

  A. Credit Score
  B. Age
  C. Income
  D. Gender
  A. Credit Score

• Question 124:

  Which word or phrase completes the statement? Business Intelligence is to monitoring trends as Data Science is to ________ trends.

  A. Predicting
  B. Discarding
  C. Driving
  D. Optimizing
  A. Predicting

• Question 125:

  Refer to the exhibit.

  In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan, and the blue represents borrowers that are

  known to have defaulted on their loan. Which analytical method could produce the probabilities needed to build this exhibit?

  

  A. Logistic Regression
  B. Linear Regression
  C. Discriminant Analysis
  D. Association Rules
  A. Logistic Regression

• Question 126:

  What is Hadoop?

  A. Java classes for HDFS types and MapReduce job management and HDFS
  B. Java classes for HDFS types and MapReduce job management and the MapReduce paradigm
  C. MapReduce paradigm and HDFS
  D. MapReduce paradigm and massive unstructured data storage on commodity hardware
  A. Java classes for HDFS types and MapReduce job management and HDFS

• Question 127:

  What is an example of a null hypothesis?

  A. that a newly created model does not provide better predictions than the currently existing model
  B. that a newly created model provides a prediction of a null sample mean
  C. that a newly created model provides a prediction of a null population mean
  D. that a newly created model provides a prediction that will be well fit to the null distribution
  A. that a newly created model does not provide better predictions than the currently existing model

• Question 128:

  When creating a project sponsor presentation, what is the main objective?

  A. Show that you met the project goals
  B. Show how you met the project goals
  C. Show how well the model will meet the SLA (service level agreement)
  D. Clearly describe the methods and techniques used
  A. Show that you met the project goals

• Question 129:

  What would be considered "Big Data"?

  A. An OLAP Cube containing customer demographic information about 100,000,000 customers
  B. Daily Log files from a web server that receives 100,000 hits per minute
  C. Aggregated statistical data stored in a relational database table
  D. Spreadsheets containing monthly sales data for a Global 100 corporation
  B. Daily Log files from a web server that receives 100,000 hits per minute

• Question 130:

  Refer to the exhibit.

  Which type of data issue would you suspect based on the exhibit?

  

  A. "Saturated" data,indicating potential issues with data definitions
  B. Incomplete data,indicating potential issues with data transmission
  C. Mis-scaled data,indicating potential issues with data entry
  D. The exhibit does not raise any obvious concerns with the data.
  A. "Saturated" data,indicating potential issues with data definitions