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EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q186-Q191):

NEW QUESTION # 186
How are window functions different from regular aggregate functions?
Response:

A. Rows retain their separate identities and the window function can access more than the current row.
B. Rows retain their separate identities and the window function can only access the current row.
C. Rows are grouped into an output row and the window function can only access the current row.
D. Rows are grouped into an output row and the window function can access more than the current row.

Answer: A

NEW QUESTION # 187
Refer to the Exhibit.

You are going into a meeting where you anticipate your manager will have a question on your dataset. Specifically, your manager will want to know about customers that are classified as renters with a good credit status. In order to prepare for the meeting, you create a rule: RENTER => GOOD CREDIT.
What is the confidence of this rule?
Response:

A. 41%
B. 18%
C. 73%
D. 63%

Answer: D

NEW QUESTION # 188
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. Howl
C. Pig
D. HBase

Answer: A

NEW QUESTION # 189
When creating a presentation for a technical audience, what is the main objective?
Response:

A. Show the technique to be used in the production environment
B. Show if the model will meet the SLA
C. Show that you met the project goals
D. Show how you met the project goals

Answer: D

NEW QUESTION # 190
You have been assigned to do a study of the daily revenue effect of a pricing model of online transactions. When have you completed the analytics lifecycle?
Response:

A. You have a completely developed model based on both a sample of the data and the entire set of data available.
B. You have a completely developed model, and the results have shown statistically acceptable results.
C. You have written documentation, and the code has been handed off to the Data Base Administrator and business operations.
D. You have presented the results of the model to both the internal analytics team and the business owner of the project.

Answer: C

NEW QUESTION # 191
......

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