EMC Associate - Data Science and Big Data Analytics v2 - DEA-7TT2 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
Response:

A. Standard error B. P-value C. Goodness of fit D. Coefficients

Discussion 0

Correct Answer: C Vote an answer

Question 2

Which data asset is an example of unstructured data?
Response:

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

Discussion 0

Correct Answer: A Vote an answer

Question 3

You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%. You calculate lift = 1.011 for the rule, "People with good credit are homeowners".
What can you determine from the lift calculation?
Response:

A. The rule is true B. Leverage of the rules is low C. Support for the association is low D. The rule is coincidental

Discussion 0

Correct Answer: D Vote an answer

Question 4

In a Logistic Regression, the coefficient for "age" equals -3. What is the correct interpretation of the Logistic Regression coefficient, holding all other variables constant?
Response:

A. When age decreases by 3 units, the odds of response are multiplied by e(-3) or 0.05 B. When age increases by 1 unit, the odds of response are multiplied by e(-3) or 0.05 C. For every 1 unit increase in age, the dependent variable is reduced by 3 units D. For every 1 unit increase in age, the dependent variable is multiplied by -3

Discussion 0

Correct Answer: B Vote an answer

Question 5

If distributed Item-based Collaborative Filtering is an algorithm supported by Mahout, what is the use case category of the algorithm?
Response:

A. Frequent Itemset B. Recommenders C. Classification D. Clustering

Discussion 0

Correct Answer: B Vote an answer

Question 6

Which clause is required by all window functions?
Response:

A. RANGE() B. OVER() C. ORDER BY D. PARTITION BY

Discussion 0

Correct Answer: B Vote an answer

Question 7

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?
Response:

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

Discussion 0

Correct Answer: A Vote an answer

Question 8

Which relationship holds for a confusion matrix?
Response:

A. Precision = 1 - False Positive Ratio B. Recall = 1 - False Positive Ratio C. Recall = 1 - False Negative Ratio D. Precision = 1 - False Negative Ratio

Discussion 0

Correct Answer: C Vote an answer

Question 9

A business colleague who is new to Hadoop approaches you with a question. The colleague wants to know the best approach to access their dat a. The colleague has previously worked extensively with SQL and databases.
Which query interface should be recommended?
Response:

A. Hive B. Pig C. Howl D. HBase

Discussion 0

Correct Answer: A Vote an answer