EMC EMC Specialist E20-026 Questions & Answers

• Question 1:

  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 B

  B. Document A

  C. Document C

  D. Document D

  Correct Answer: A

• Question 2:

  Refer to the exhibit.

  Click on the calculator icon in the upper left corner. You are going into a meeting where you know your

  manager will have a question on your dataset -- specifically relating to customers that are classified as

  renters with good credit status.

  In order to prepare for the meeting, you create a rule: RENTER => GOOD CREDIT. What is the

  confidence of the rule?

  

  A. 63%

  B. 41%

  C. 18%

  D. 73%

  Correct Answer: A

• Question 3:

  Which ROC curve represents a perfect model fit? A)

  

  B)

  

  C) 52 / 55

  

  D)

  

  A. Exhibit A

  B. Exhibit B

  C. Exhibit C

  D. Exhibit D

  Correct Answer: A

• Question 4:

  Refer to the exhibit.

  You have scored your Naive bayesian classifier model on a hold out test data for cross validation and

  determined the way the samples scored and tabulated them as shown in the exhibit. What are the the

  False Positive Rate (FPR) and the False Negative Rate (FNR) of the model?

  

  A. FPR = 15/262 FNR = 26/288

  B. FPR = 26/288 FNR = 15/262

  C. FPR = 262/15 FNR = 288/26

  D. FPR = 288/26 FNR = 262/15

  Correct Answer: A

• Question 5:

  Refer to the exhibit.

  You have scored your Naive bayesian classifier model on a hold out test data for cross validation and

  determined the way the samples scored and tabluated them as shown in the exhibit.

  What are the Precision and Recall rate of the model?

  

  A. Precision = 262/277 Recall = 262/288

  B. Precision =262/288 Recall = 262/277

  C. Precision = 277/262 Recall = 288/262

  D. Precision = 288/262 Recall = 277/262

  Correct Answer: A

• Question 6:

  Refer to the exhibit.

  The graph represents an ROC space with four classifiers labelled A through D. Which point in the graph

  represents a perfect classification?

  

  A. S

  B. P

  C. Q

  D. R

  Correct Answer: A

• Question 7:

  Refer to the exhibit Consider the training data set shown in the exhibit. What are the classification (Y = 0 or 1) and the probability of the classification for the tuple X(1, 0, 0) using Naive Bayesian classifier?

  

  A. Classification Y = 0,Probability = 4/54

  B. Classification Y = 1,Probability = 4/54

  C. Classification Y = 0,Probability = 1/54

  D. Classification Y = 1,Probability = 1/54

  Correct Answer: A

• Question 8:

  Refer to the exhibit.

  The exhibit shows four graphs labeled as Fig A thorough Fig D. Which figure represents the entropy

  function relative to a Boolean classification and is represented by the formula shown in Exhibit?

  

  A. Fig-A

  B. Fig-B

  C. Fig-C

  D. Fig-D

  Correct Answer: A

• Question 9:

  Refer to the exhibit.

  You ran a linear regression, and the final output is seen in the exhibit. Based only on the information in the

  exhibit and an acceptable confidence level of 95%, how would you interpret the interaction of variable D

  with the dependent variable?

  

  A. In this model,Variable D is not significantly interacting with the dependent variable

  B. For every 1 unit increase in variable D,holding all other variables constant,we can expect the dependent variable to increase by 10.23 units

  C. For every 1 unit increase in variable D,holding all other variables constant,we can expect the dependent variable to be multiplied by 10.23 units

  D. Variable D is more significant than variables A,B,and C.

  Correct Answer: A

• Question 10:

  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

  Correct Answer: A