EMC EMC Certifications E20-007 Questions & Answers

• Question 31:

  Refer to the exhibit.

  

  Click on the calculator icon in the upper left corner. You are given a list of pre-defined association rules:

  A. RENTER => BAD CREDIT

  B. RENTER => GOOD CREDIT

  C. HOME OWNER => BAD CREDIT

  D. HOME OWNER => GOOD CREDIT

  E. FREE HOUSING => BAD CREDIT

  F. FREE HOUSING => GOOD CREDIT For your next analysis, you must limit your dataset based on rules with confidence greater than 60%. Which of the rules will be kept in the analysis?

  A. Rules B and D

  B. Rules A and F

  C. Rules C and E

  D. Rules D and E

  Correct Answer: A

• Question 32:

  When would you prefer a Naive Bayes model to a logistic regression model for classification?

  A. When you are using several categorical input variables with over 1000 possible values each.

  B. When you need to estimate the probability of an outcome, not just which class it is in.

  C. When all the input variables are numerical.

  D. When some of the input variables might be correlated.

  Correct Answer: A

• Question 33:

  What describes the use of UNION clause in a SQL statement?

  A. Operates on queries and potentially increases the number of rows

  B. Operates on queries and potentially decreases the number of rows

  C. Operates on tables and potentially decreases the number of columns

  D. Operates on both tables and queries and potentially increases both the number of rows and columns

  Correct Answer: A

• Question 34:

  What describes a true property of a Logistic Regression method?

  A. Robust with redundant variables and correlated variables

  B. Handles missing values well

  C. Works well with discrete variables that have many distinct values

  D. Works well with variables that affect the outcome in a discontinuous way

  Correct Answer: A

• Question 35:

  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

  Correct Answer: A

• Question 36:

  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

  Correct Answer: A

• Question 37:

  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

  Correct Answer: A

• Question 38:

  Which word or phrase completes the statement? Mahout is to Hadoop as MADlib is to ____________ .

  A. PostgreSQL

  B. R

  C. Excel

  D. SAS

  Correct Answer: A

• Question 39:

  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

  Correct Answer: A

• Question 40:

  Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best to access their data. This colleague has a strong background in data flow languages and programming. Which query interface would you recommend?

  A. Pig

  B. Hive

  C. Howl

  D. HBase

  Correct Answer: A