最新的EMC Data Science and Big Data Analytics - E20-007免費考試真題
You submit a MapReduce job to a Hadoop cluster and notice that although the job was successfully submitted, it is not completing. What should you do?
正確答案: B
A call center for a large electronics company handles an average of 35, 000 support calls a day. The head of the call center would like to optimize the staffing of the call center during the rollout of a new product due to recent customer complaints of long wait times. You have been asked to create a model to optimize call center costs and customer wait times.
The goals for this project include:
1.Relative to the release of a product, how does the call volume change over time?
2.How to best optimize staffing based on the call volume for the newly released product, relative to old products.
3.Historically, what time of day does the call center need to be most heavily staffed?
4.Determine the frequency of calls by both product type and customer language.
Which goals are suitable to be completed with MapReduce?
The goals for this project include:
1.Relative to the release of a product, how does the call volume change over time?
2.How to best optimize staffing based on the call volume for the newly released product, relative to old products.
3.Historically, what time of day does the call center need to be most heavily staffed?
4.Determine the frequency of calls by both product type and customer language.
Which goals are suitable to be completed with MapReduce?
正確答案: C
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in their massively parallel database. Which tool should they use to export the structured data from Hadoop?
正確答案: B
In data visualization, which type of chart is recommended to represent frequency data?
正確答案: B
What is required in a presentation for business analysts?
正確答案: A
What is an appropriate data visualization to use in a presentation for a project sponsor?
正確答案: A
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)?
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (gloves -> hat)?
正確答案: A
Refer to the exhibit.
You have created a density plot of purchase amounts from a retail website as shown. What should you do next?
You have created a density plot of purchase amounts from a retail website as shown. What should you do next?
正確答案: B
Refer to the exhibit.
After analyzing a dataset, you report findings to your team:
1.Variables A and C are significantly and positively impacting the dependent variable.
2.Variable B is significantly and negatively impacting the dependent variable.
3.Variable D is not significantly impacting the dependent variable.
After seeing your findings, the majority of your team agreed that variable B should be positively impacting the dependent variable.
What is a possible reason the coefficient for variable B was negative and not positive?
After analyzing a dataset, you report findings to your team:
1.Variables A and C are significantly and positively impacting the dependent variable.
2.Variable B is significantly and negatively impacting the dependent variable.
3.Variable D is not significantly impacting the dependent variable.
After seeing your findings, the majority of your team agreed that variable B should be positively impacting the dependent variable.
What is a possible reason the coefficient for variable B was negative and not positive?
正確答案: D
Refer to the exhibit.
Click on the calculator icon in the upper left corner. You are going into a meeting where you know your manager will have a question on your dataset -- specifically relating to customers that are classified as renters with good credit status.
In order to prepare for the meeting, you create a rule: RENTER => GOOD CREDIT. What is the confidence of the rule?
Click on the calculator icon in the upper left corner. You are going into a meeting where you know your manager will have a question on your dataset -- specifically relating to customers that are classified as renters with good credit status.
In order to prepare for the meeting, you create a rule: RENTER => GOOD CREDIT. What is the confidence of the rule?
正確答案: C
You are testing two new weight-gain formulas for puppies. The test gives the results:
Control group: 1% weight gain
Formula A. 3% weight gain
Formula B. 4% weight gain A one-way ANOVA returns a p-value = 0.027
What can you conclude?
Control group: 1% weight gain
Formula A. 3% weight gain
Formula B. 4% weight gain A one-way ANOVA returns a p-value = 0.027
What can you conclude?
正確答案: A