EMC E20-007 Online Practice Questions and Exam Preparation

EMC E20-007 Online Questions & Answers

• Question 11:

  In which phase of the analytic lifecycle would you expect to spend most of the project time?

  A. Discovery
  B. Data preparation
  C. Communicate Results
  D. Operationalize
  B. Data preparation

• Question 12:

  Which word or phrase completes the statement; "A data scientist would consider a RDBMS is to a table as R is to a ___________."?

  A. Data frame
  B. List
  C. Matrix
  D. Array
  A. Data frame

• Question 13:

  You have two tables of customers in your database. Customers in cust_table_1 were sent an e-mail promotion last year, and customers in cust_table_2 received a newsletter last year. Customers can only be entered in once per table. You want to create a table that includes all customers, and any of the communications they received last year. Which type of join would you use for this table?

  A. Full outer join
  B. Inner join
  C. Left outer join
  D. Cross join
  A. Full outer join

• Question 14:

  Refer to the exhibit.

  

  Click on the calculator icon in the upper left corner. An analyst is searching a corpus of documents for the topic "solid state disk". In the Exhibit, Table A provides the inverse document frequency for each term across the corpus. Table B provides each term's frequency in four documents selected from corpus. Which of the four documents is most relevant to the analyst's search?

  A. Document C
  B. Document A
  C. Document B
  D. Document D
  A. Document C

• Question 15:

  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 16:

  You have plotted the distribution of savings account sizes for a bank.

  

  Based on the distribution shown in the exhibit, how would you proceed?

  A. Data is extremely skewed. Replot the data on a logarithmic scale to get a better understanding of it.
  B. Data is extremely skewed but looks bimodal. Replot the data in the range 2,500 - 10,000 to be certain.
  C. Accounts of sizes greater than 2,500 are rare and are most likely outliers. Eliminate them from future analysis.
  D. Data is extremely skewed. Split the analysis into two cohorts; accounts less than 2,500 and accounts greater than 2,500.
  A. Data is extremely skewed. Replot the data on a logarithmic scale to get a better understanding of it.

• Question 17:

  Which ROC curve represents a perfect model fit?

  A. Exhibit A
  B. Exhibit B
  C. Exhibit C
  D. Exhibit D
  A. Exhibit A

• Question 18:

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

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

• Question 19:

  To ensure a successful analytic project, which key role can consult and advise the project team on the value of end results and how these will be used on a daily basis?

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

• Question 20:

  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