E20-007 Online Practice Questions and Answers

Which word or phrase completes the statement? Business Intelligence is to monitoring trends as Data Science is to ________ trends.

A. Predicting

B. Discarding

C. Driving

D. Optimizing

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 previously worked extensively with SQL and databases.

Which query interface would you recommend?

A. Hive

B. Pig

C. Howl

D. HBase

Refer to the exhibit.

In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan, and the blue represents borrowers that are known to have defaulted on their loan.

Which analytical method could produce the probabilities needed to build this exhibit?

A. Logistic Regression

B. Linear Regression

C. Discriminant Analysis

D. Association Rules

Your company has 3 different sales teams. Each team's sales manager has developed incentive offers to increase the size of each sales transaction. Any sales manager whose incentive program can be shown to increase the size of the average sales transaction will receive a bonus.

Data are available for the number and average sale amount for transactions offering one of the incentives as well as transactions offering no incentive.

The VP of Sales has asked you to determine analytically if any of the incentive programs has resulted in a demonstrable increase in the average sale amount. Which analytical technique would be appropriate in this situation?

A. One-way ANOVA

B. Multi-way ANOVA

C. Student's t-test

D. Wilcoxson Rank Sum Test

You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. All data currently available to you has been loaded into your analytics database. This includes revenue data, pricing data, and online transaction data.

You discover that all data comes in different levels of granularity. The transaction data has timestamps consisting of day, hour, minutes, and seconds. Pricing is stored at the daily level and revenue data is only reported monthly.

What is the next step?

A. Report back to the business owner that the current data model does not support the business question.

B. Interpolate a daily model for revenue from the monthly revenue data.

C. Aggregate all data to the monthly level in order to create a monthly revenue model.

D. Disregard revenue as the key reason in the pricing model and create a daily model based on pricing and transactions only.

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)?

A. 75%

B. 60%

C. 66%

D. 80%

You have completed your model and are handing it off to be deployed in production. What should you deliver to the production team, along with your commented code?

A. The production team needs to understand how your model will interact with the processes they already support. Give them documentation on expected model inputs and outputs, and guidance on error-handling.

B. The production team are technical, and they need to understand how the processes that they support work, so give them the same presentation that you prepared for the analysts.

C. The production team supports the processes that run the organization, and they need context to understand how your model interacts with the processes they already support. Give them the same presentation that you prepared for the project sponsor.

D. The production team supports the processes that run the organization, and they need context to understand how your model interacts with the processes they already support. Give them the executive summary.

Which word or phrase completes the statement? Mahout is to Hadoop as MADlib is to ____________ .

A. PostgreSQL

B. R

C. Excel

D. SAS

Your organization has a website where visitors randomly receive one of two coupons. It is also possible that visitors to the website will not receive a coupon. You have been asked to determine if offering a coupon to visitors to your website has any impact on their purchase decision.

Which analysis method should you use?

A. K-means clustering

B. Association rules

C. Student T-test

D. One-way ANOVA

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?

A. S

B. P

C. Q

D. R