EMC E20-026 Online Practice Questions and Exam Preparation

EMC E20-026 Online Questions & Answers

• Question 61:

  Consider these itemsets:

  (hat, scarf, coat) (hat, scarf, coat, gloves)

  (hat, scarf, gloves)

  (hat, gloves)

  (scarf, coat, gloves)

  What is the confidence of the rule (hat, scarf) -> gloves?

  A. 66%
  B. 40%
  C. 50%
  D. 60%
  A. 66%

• Question 62:

  You have used k-means clustering to classify behavior of 100, 000 customers for a retail store. You decide to use household income, age, gender and yearly purchase amount as measures. You have chosen to use 8 clusters and notice that 2 clusters only have 3 customers assigned. What should you do?

  A. Decrease the number of clusters
  B. Increase the number of clusters
  C. Decrease the number of measures used
  D. Identify additional measures to add to the analysis
  A. Decrease the number of clusters

• Question 63:

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

  A. Advanced analytical methods
  B. Robust reporting
  C. Focus on structured data
  D. Data dashboards
  A. Advanced analytical methods

• Question 64:

  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 65:

  Which of the following is an example of quasi-structured data?

  A. OLAP
  B. OLTP
  C. Customer record table
  D. Clickstream data
  A. OLAP

• Question 66:

  Which word or phrase completes the statement? Structured data is to OLAP data as quasi-structured data is to____

  A. Clickstream data
  B. XML data
  C. Text documents
  D. Image files
  A. Clickstream data

• Question 67:

  Which key role for a successful analytic project can consult and advise the project team on the value of end results and how these will be used on a day-to-day basis?

  A. Business User
  B. Project Manager
  C. Data Scientist
  D. Business Intelligence Analyst
  A. Business User

• Question 68:

  Which activity might be performed in the Operationalize phase of the Data Analytics Lifecycle?

  A. Run a pilot
  B. Try different analytical techniques
  C. Try different variables
  D. Transform existing variables
  A. Run a pilot

• Question 69:

  Consider the example of an analysis for fraud detection on credit card usage. You will need to ensure higher-risk transactions that may indicate fraudulent credit card activity are retained in your data for analysis, and not dropped as outliers during pre-processing. What will be your approach for loading data into the analytical sandbox for this analysis?

  A. ELT
  B. ETL
  C. EDW
  D. OLTP
  A. ELT

• Question 70:

  In a Student's t-test, what is the meaning of the p-value?

  A. it is the area under the appropriate tails of the Student's distribution
  B. it is the "power" of the Student's t-test
  C. it is the mean of the distribution for the null hypothesis
  D. it is the mean of the distribution for the alternate hypothesis
  A. it is the area under the appropriate tails of the Student's distribution