Data Science and Big Data Analytics

Here you have the best Dell E20-007 practice exam questions

You have 165 total questions to study from
Each page has 5 questions, making a total of 33 pages
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This questions were last updated on January 21, 2026
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Question 1 of 165

You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;

Goodness of fit

Coefficients

Standard error

P-value

Correct Answer: A

Question 2 of 165

Which data asset is an example of quasi-structured data?

Webserver log

XML data file

Database table

News article

Correct Answer: A

Question 3 of 165

What would be considered "Big Data"?

An OLAP Cube containing customer demographic information about 100, 000, 000 customers

Daily Log files from a web server that receives 100, 000 hits per minute

Aggregated statistical data stored in a relational database table

Spreadsheets containing monthly sales data for a Global 100 corporation

Correct Answer: B

Question 4 of 165

A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the Internet. What is the most appropriate model to use? Suppose labeled training data is available.

Naïve Bayesian classifier

Linear regression

Logistic regression

K-means clustering

Correct Answer: A

Question 5 of 165

In which lifecycle stage are test and training data sets created?

Model building

Model planning

Discovery

Data preparation

Correct Answer: A