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EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q77-Q82):

NEW QUESTION # 77
In which lifecycle stage are appropriate analytical techniques determined?
Response:

A. Model building
B. Model planning
C. Data preparation
D. Discovery

Answer: B

NEW QUESTION # 78
How are window functions different from regular aggregate functions?
Response:

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

Answer: D

NEW QUESTION # 79
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?
Response:

A. FPR = 15/262 FNR = 26/288
B. FPR = 262/15 FNR = 288/26
C. FPR = 26/288 FNR = 15/262
D. FPR = 288/26 FNR = 262/15

Answer: A

NEW QUESTION # 80
What describes the use of UNION clause in a SQL statement?
Response:

A. Operates on both tables and queries and potentially increases both the number of rows and columns
B. Operates on queries and potentially increases the number of rows
C. Operates on tables and potentially decreases the number of columns
D. Operates on queries and potentially decreases the number of rows

Answer: B

NEW QUESTION # 81
Which data asset is an example of quasi-structured data?
Response:

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

Answer: B

NEW QUESTION # 82
......

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EMC DEA-7TT2 Valid Test Registration | Valid DEA-7TT2 Test Preparation

Valid DEA-7TT2 Test Preparation | DEA-7TT2 Reliable Test Cram

EMC Associate - Data Science and Big Data Analytics v2 Exam Sample Questions (Q77-Q82):

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