最新的EMC Associate - Data Science and Big Data Analytics v2 - DEA-7TT2免費考試真題
Before building an ARMA model, how can you determine if the time series is weakly stationary?
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Response:
正確答案: D
In a t-test with unknown variance, what values are used to calculate the t-statistic?
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Response:
正確答案: B
What describes the use of UNION clause in a SQL statement?
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Response:
正確答案: D
Consider this SQL statement:
SELECT product, prod_cost, avg(prod_cost) OVER (PARTITION BY product)
FROM product_detail
The OVER clause makes this what type of function?
Response:
SELECT product, prod_cost, avg(prod_cost) OVER (PARTITION BY product)
FROM product_detail
The OVER clause makes this what type of function?
Response:
正確答案: C
What is an appropriate data visualization to use in a presentation to a project sponsor?
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Response:
正確答案: A
What provides the means for matching and manipulating text strings in SQL?
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Response:
正確答案: D
Which word or phrase completes the statement? Theater actor is to "Artistic and Expressive" as Data Scientist is to __________ Response:
正確答案: D
A Data Scientist is assigned to build a model from a reporting data warehouse. The warehouse contains data collected from many sources and transformed through a complex, multi-stage ETL process.
What is a concern the data scientist should have about the data?
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What is a concern the data scientist should have about the data?
Response:
正確答案: B
You have scored your Naive Bayesian Classifier model on "hold out" test data for cross validation. You have determined the way the samples scored and have tabulated them as shown in the exhibit.
What are the Precision and Recall rates of the model?
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What are the Precision and Recall rates of the model?
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正確答案: D
A disk drive manufacturer has a defect rate of less than 1.5% with 98% confidence. A quality assurance team samples 1000 disk drives and finds 14 defective units. Which action should the team recommend?
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Response:
正確答案: D
Which of the following is an example of quasi-structured data?
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Response:
正確答案: D
During a study to understand the population growth of a certain bacterial culture, you plot the data and identify a quadratic growth trend over time. Which transformation should you apply to linearize the data?
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Response:
正確答案: B
Consider these itemsets:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (hat, scarf) => gloves?
Response:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (hat, scarf) => gloves?
Response:
正確答案: D
What are the characteristics of Big Data?
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Response:
正確答案: A