E20-026 Online Practice Questions and Answers

When creating a presentation for a technical audience, what is the main objective?

A. Show that you met the project goals

B. Show how you met the project goals

C. Show if the model will meet the SLA

D. Show the technique to be used in the production environment

Under which circumstance do you need to implement N-fold cross-validation after creating a regression model?

A. There is not enough data to create a test set.

B. The data is unformatted.

C. There are missing values in the data.

D. There are categorical variables in the model.

Consider a scale that has five (5) values that range from "not important" to "very important". Which data classification best describes this data?

A. Ordinal

B. Nominal

C. Real

D. Ratio

In addition to less data movement and the ability to use larger datasets in calculations, what is a benefit of analytical calculations in a database?

A. quicker time to insight

B. more efficient handling of categorical values

C. improved connections between disparate data sources

D. full use of data aggregation functionality

Data visualization is used in the final presentation of an analytics project. For what else is this technique commonly used?

A. Assessing data quality

B. Descriptive statistics

C. ETLT

D. Model selection

A. Mahout

B. HBase

C. Scribe

D. Sqoop

When would you use a Wilcoxson Rank Sum test?

A. When you cannot make an assumption about the distribution of the populations

B. When the data can easily be sorted

C. When the populations represent the sums of other values

D. When the data cannot easily be sorted

Assume that you have a data frame in R. Which function would you use to display descriptive statistics about this variable?

A. summary

B. str

C. attributes

D. levels

Which word or phrase completes the statement?

Business Intelligence is to ad-hoc reporting and dashboards as Data Science is to ______________ .

A. Optimization and Predictive Modeling

B. Alerts and Queries

C. Structured Data and Data Sources

D. Sales and profit reporting

Refer to the exhibit Consider the training data set shown in the exhibit. What are the classification (Y = 0 or 1) and the probability of the classification for the tuple X(1, 0, 0) using Naive Bayesian classifier?

A. Classification Y = 0,Probability = 4/54

B. Classification Y = 1,Probability = 4/54

C. Classification Y = 0,Probability = 1/54

D. Classification Y = 1,Probability = 1/54