EMC Dell Data Science Foundations - D-DS-FN-23 Exam Questions [2026]

QUESTION NO: 1
Which word or phrase completes the statement? A data warehouse is to a centralized database for reporting as an analytic sandbox is to a _______?

A. Collection of low-volume databases B. Centralized database of KPIs C. Collection of data assets for modeling D. Collection of data assets for ETL

Correct Answer: C

QUESTION NO: 2
Refer to the exhibit.

In association rules, for itemsets X and Y, which expression defines leverage?

A. a B. b C. d D. c

Correct Answer: A

QUESTION NO: 3
What is a benefit of Spark in-memory data processing as opposed to using MapReduce?

A. Avoids writing intermediate data to disk, which speeds up processing B. Allows parallel processing, which MapReduce does not support C. Supports processing unstructured data, which MapReduce does not allow D. Removes the need to use disks at all, which reduces cost

Correct Answer: A

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QUESTION NO: 4
What type of variable is the dependent variable from a logistic regression?

A. Continuous B. Interval C. Categorical D. Ratio

Correct Answer: C

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QUESTION NO: 5
What is Hadoop?

A. Java classes for HDFS types and Map Reduce job management and the Map Reduce paradigm B. Map Reduce paradigm and massive unstructured data storage on commodity hardware C. Java classes for HDFS types and Map Reduce job management and HDFS D. Map Reduce paradigm and HDFS

Correct Answer: C

QUESTION NO: 6
What are challenges presented by Big Data?

A. New technologies, tools and regulatory rules only B. New technologies, and tools only C. New technologies, tools, and business processes only D. New technologies, tools, business processes, and regulatory rules

Correct Answer: D

QUESTION NO: 7
On analyzing your time series data you suspect that the data represented as y1, y2, y3, ... , yn-1, yn may have a trend component that is quadratic in nature.
Which pattern of data will indicate that the trend in the time series data is quadratic in nature?

A. (y4-y2) - (y3-y1) = .........= (yn-yn-2)-(yn-1-yn-3) B. ((y2-y1) /y1 ) * 100% = .......((yn-yn-1)/yn-1) * 100% C. (y3-y2) - (y2-y1) = .........= (yn-yn-1)-(yn-1-yn-2) D. (y2-y1) = (y3-y2) = ....... = (yn-yn-1)

Correct Answer: C

QUESTION NO: 8
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. R B. Q C. S D. P

Correct Answer: C

QUESTION NO: 9
A Data Scientist is assigned to build a model from a reporting data warehouse. The warehouse contains data collected from many sources and transformed through a complex, multi-stage ETL process.
What is a concern the data scientist should have about the data?

A. It is too processed B. It is too centralized C. It is not structured D. It is not normalized

Correct Answer: A

QUESTION NO: 10
What is one modeling or descriptive statistical function in MADlib that is typically not provided in a standard relational database?

A. Expected value B. Variance C. Linear regression D. Quantiles

Correct Answer: C