DELL EMC D-DS-FN-23 Dell Data Science Foundations 2023 Online Training
DELL EMC D-DS-FN-23 Online Training
The questions for D-DS-FN-23 were last updated at Jan 30,2025.
- Exam Code: D-DS-FN-23
- Exam Name: Dell Data Science Foundations 2023
- Certification Provider: DELL EMC
- Latest update: Jan 30,2025
When is a Wilcoxon Rank-Sum test used?
- A . When an assumption about the distribution of the populations cannot be made
- B . When the data can be easily sorted
- C . When the populations represent the sums of other values
- D . When the data cannot be easily sorted
Refer to the Exhibit.
In the Exhibit. For effective visualization, what is the chart’s primary flaw?
- A . The use of 3 dimensions.
- B . The slanting of axis labels.
- C . The location of the legend.
- D . The order of the columns.
What requests resources from YARN during a MapReduce job?
- A . Map and reduce tasks
- B . ApplicationMaster
- C . ApplicationsManager
- D . DataNodes
Since R factors are categorical variables, they are most closely related to which data classification level?
- A . nominal
- B . ordinal
- C . interval
- D . ratio
What is a distinct property of Logistic Regression compared with Linear Regression?
- A . Logistic Regression handles missing values well
- B . Logistic Regression is robust with redundant or correlated variables
- C . Logistic Regression returns probability estimates of an event
- D . Logistic Regression works well with discrete variables that have many distinct values
You are building a logistic regression model to predict whether a tax filer will be audited within the next two years. Your training set population is 1000 filers. The audit rate in your training data is 4.2%.
What is the sum of the probabilities that the model assigns to all the filers in your training set that have been audited?
- A . 42.0
- B . 4.2
- C . 0.42
- D . 0.042
Consider the example of an analysis for fraud detection on credit card usage. You will need to ensure higher-risk transactions that may indicate fraudulent credit card activity are retained in your data for analysis, and not dropped as outliers during pre-processing.
What will be your approach for loading data into the analytical sandbox for this analysis?
- A . ELT
- B . ETL
- C . EDW
- D . OLTP
What is an appropriate data visualization to use in a presentation for an analyst audience?
- A . Pie chart
- B . Area chart
- C . Stacked bar chart
- D . ROC curve
How is HDFS defined?
- A . Large “web table” capable of holding millions of rows and millions of columns
- B . Row-column oriented datastore supporting redundancy and high availability
- C . Reliable, redundant distributed file system
- D . Reliable file system stored on a single extensible storage platform
Which word or phrase completes the statement? Structured data is to OLAP data as quasi- structured data is to
- A . Clickstream data
- B . XML data
- C . Text documents
- D . Image files
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