EMC E20-007 Online Practice Questions and Exam Preparation

EMC E20-007 Online Questions & Answers

• Question 181:

  Which word or phrase completes the statement? A spreadsheet is to a data island as a centralized database for reporting is to a ________?

  A. Data Warehouse
  B. Data Repository
  C. Analytic Sandbox
  D. Data Mart
  A. Data Warehouse

• Question 182:

  Which type of numeric value does a logistic regression model estimate?

  A. Probability
  B. A p-value
  C. Any integer
  D. Any real number
  A. Probability

• Question 183:

  You have run the association rules algorithm on your data set, and the two rules {banana, apple} => {grape} and {apple, orange}=> {grape} have been found to be relevant. What else must be true?

  A. {grape, apple, orange} must be a frequent itemset.
  B. {banana, apple, grape, orange} must be a frequent itemset.
  C. {grape} => {banana, apple} must be a relevant rule.
  D. {banana, apple} => {orange} must be a relevant rule.
  A. {grape, apple, orange} must be a frequent itemset.

• Question 184:

  What does the R code

  z <- f[1:10, ]

  do?

  A. Assigns the first 10 rows of f to the vector z
  B. Assigns the 1st 10 columns of the 1st row of f to z
  C. Assigns a sequence of values from 1 to 10 to z
  D. Assigns the 1st 10 columns to z
  A. Assigns the first 10 rows of f to the vector z

• Question 185:

  Refer to the exhibit.

  

  In the exhibit, a correlogram is provided based on an autocorrelation analysis of a sample dataset. What can you conclude based only on this exhibit?

  A. There appears to be no structure left to model in the data
  B. There appears to be a seasonal component in the data
  C. Lag 1 has a significant autocorrelation
  D. There appears to be a cyclical component in the data
  A. There appears to be no structure left to model in the data

• Question 186:

  What is the reason for using LOESS?

  A. Fits a smoothed curve to scatterplot data; providing a general idea of the data's behavior
  B. Significance test for the correlation between two variables
  C. Plots a continuous variable versus a discrete variable; comparing distributions across classes
  D. Runs after a one-way ANOVA; determining which population has the highest mean value
  A. Fits a smoothed curve to scatterplot data; providing a general idea of the data's behavior

• Question 187:

  Which characteristic applies only to Business Intelligence as opposed to Data Science?

  A. Uses only structured data
  B. Supports solving "what if" scenarios
  C. Uses large data sets
  D. Uses predictive modeling techniques
  A. Uses only structured data

• Question 188:

  Which data asset is an example of semi-structured data?

  A. XML data file
  B. Database table
  C. Webserver log
  D. News article
  A. XML data file

• Question 189:

  Refer to the exhibit.

  

  You are using k-means clustering to discover groupings within a data set. You plot within- sum-of-squares (wss) of multiple cluster sizes. Based on the exhibit, how many clusters should you use in your analysis?

  A. 4
  B. 2
  C. 8
  D. 10
  A. 4

• Question 190:

  Which word or phrase completes the statement? Unix is to bash as Hadoop is to:

  A. Pig
  B. HDFS
  C. Sqoop
  D. NameNode
  A. Pig