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EMC E20-007 問題練習

Data Science and Big Data Analytics 試験

最新更新時間: 2019/05/10,合計351問。

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Question No : 1
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?

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Question No : 2
Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?

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Question No : 3
You have fit a decision tree classifier using 12 input variables. The resulting tree used 7 of the 12 variables, and is 5 levels deep. Some of the nodes contain only 3 data points. The AUC of the model is 0.85. What is your evaluation of this model?

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Question No : 4
Which data asset is an example of semi-structured data?

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Question No : 5
Which ROC curve represents a perfect model fit?
A)



B)



C)



D)



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Question No : 6
You submit a MapReduce job to a Hadoop cluster. However, you notice that although the job was successfully submitted, it is not completing.
What should be done to identify the issue?

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Question No : 7
Which word or phrase completes the statement? A data warehouse is to a centralized database for reporting as an analytic sandbox is to a _______?

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Question No : 8
Data visualization is used in the final presentation of an analytics project. For what else is
this technique commonly used?

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Question No : 9
In data visualization, what is used to focus the audience on a key part of a chart?

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Question No : 10
What does R code nv <- v[v < 1000] do?

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Question No : 11
In the MapReduce framework, what is the purpose of the Map Function?

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Question No : 12
Which characteristic applies mainly to Data Science as opposed to Business Intelligence?

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Question No : 13
You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. When is the analytics lifecycle considered completed?

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Question No : 14
When would you prefer a Naive Bayes model to a logistic regression model for classification?

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Question No : 15
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 (gloves -> hat)?

正解:

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