EMC E20-026 Online Practice Questions and Exam Preparation

EMC E20-026 Online Questions & Answers

• Question 91:

  Trend, seasonal, and cyclical are components of a time series. What is another component?

  A. Irregular
  B. Linear
  C. Quadratic
  D. Exponential
  A. Irregular

• Question 92:

  In MADlib what does MAD stand for?

  A. Magnetic,Agile,Deep
  B. Machine Learning,Algorithms for Databases
  C. Mathematical Algorithms for Databases
  D. Modular,Accurate,Dependable
  C. Mathematical Algorithms for Databases

• Question 93:

  Refer to the Exhibit.

  In the Exhibit, the table shows the values for the input Boolean attributes "A", "B", and "C". It also shows the values for the output attribute "class". Which decision tree is valid for the data?

  

  A. Tree B
  B. Tree A
  C. Tree C
  D. Tree D
  A. Tree B

• Question 94:

  You have been assigned to run a linear regression model for each of 5, 000 distinct districts, and all the data is currently stored in a PostgreSQL database. Which tool/library would you use to produce these models with the least effort?

  A. MADlib
  B. Mahout
  C. R
  D. HBase
  A. MADlib

• Question 95:

  Refer to the exhibit.

  After analyzing a dataset, you report findings to your team:

  1.

  Variables A and C are significantly and positively impacting the dependent variable.

  2.

  Variable B is significantly and negatively impacting the dependent variable.

  3.

  Variable D is not significantly impacting the dependent variable. After seeing your findings, the majority of your team agreed that variable B should be positively impacting the dependent variable. What is a possible reason the coefficient for variable B was negative and not positive?

  

  A. Variable B is interacting with another variable due to correlated inputs
  B. Variable B needs a quadratic transformation due to its relationship to the dependent variable
  C. The information gain from variable B is already provided by another variable
  D. Variable B needs a logarithmic transformation due to its relationship to the dependent variable
  A. Variable B is interacting with another variable due to correlated inputs

• Question 96:

  What is required in a presentation for project sponsors?

  A. The "Big Picture" takeaways for executive level stakeholders
  B. Data warehouse design changes
  C. Line by line review of the developed code
  D. Detailed statistical basis for the modeling approach used in the project
  A. The "Big Picture" takeaways for executive level stakeholders

• Question 97:

  Which word or phrase completes the statement?

  Business Intelligence is to ad-hoc reporting and dashboards as Data Science is to ______________ .

  A. Optimization and Predictive Modeling
  B. Alerts and Queries
  C. Structured Data and Data Sources
  D. Sales and profit reporting
  A. Optimization and Predictive Modeling

• Question 98:

  You are studying the behavior of a population, and you are provided with multidimensional data at the individual level. You have identified four specific individuals who are valuable to your study, and would like to find all users who are most similar to each individual. Which algorithm is the most appropriate for this study?

  A. K-means clustering
  B. Linear regression
  C. Association rules
  D. Decision trees
  A. K-means clustering

• Question 99:

  In which lifecycle stage are initial hypotheses formed?

  A. Discovery
  B. Model planning
  C. Model building
  D. Data preparation
  A. Discovery

• Question 100:

  Refer to the exhibit.

  You have created a density plot of purchase amounts from a retail website as shown. What should you do next?

  

  A. Recreate the plot using the barplot() function
  B. Use the rug() function to add elements to the plot
  C. Recreate the density plot using a log normal distribution of the purchase amount data
  D. Reduce the sample size of the purchase amount data used to create the plot
  C. Recreate the density plot using a log normal distribution of the purchase amount data