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Free Dell Data Science Foundations Practice Questions

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Exam style questions across every D-DS-FN-23 domain

Last Update 20 hours ago
Total Questions : 59

Start with our free D-DS-FN-23 practice questions, carefully crafted to mirror the domains, phrasing, and difficulty of the real Data Science exam. Each D-DS-FN-23 exam question comes with a detailed rationale that explains not just which answer is correct but why the others fall short. That's how concepts stick. Use the free set to benchmark yourself: identify your DELL EMC weak domains, see where you're losing marks, and build a focused study plan in minutes.

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Question # 1

Which SQL OLAP grouping extension returns a result for each output row with 1 identifying a summary row and 0 identifying grouped rows?

Options:

A.  

CUBE

B.  

GROUPING

C.  

GROUP ID

D.  

ROLLUP

Discussion 0
Question # 2

Which analytic technique would be appropriate to estimate home sale price in U.S. dollars as a function of square footage, number of bedrooms, and lot size?

Options:

A.  

Time series analysis

B.  

Linear regression

C.  

Naive Bayesian classification

D.  

K-means clustering

Discussion 0
Question # 3

In time series analysis, what function is examined to identify the order of the autoregressive component of an ARIMA model?

Options:

A.  

Logistic function

B.  

Lognormal distribution function

C.  

Partial autocorrelation function

D.  

Normal distribution function

Discussion 0
Question # 4

What is a business driver for Big Data analytics adoption?

Options:

A.  

Implement the latest technology and tools

B.  

Maintain existing data silos

C.  

Identify new business opportunities

D.  

Ensure the analysts work in isolation

Discussion 0
Question # 5

In ANOVA, what is the null hypothesis for k population means?

Options:

A.  

All population means are equal to each other

B.  

At least two population means are equal

C.  

At least two population means are not equal

D.  

At most k-1 population means are equal

Discussion 0
Question # 6

What are three built-in data types in the R programming language?

Options:

A.  

Boolean, integer, and character

B.  

Boolean, table, and character

C.  

Boolean, table, and integer

D.  

List, array, and integer

Discussion 0
Question # 7

What is the similarity between the matrix and array data structures in R?

Options:

A.  

Both structures can contain only integers

B.  

Both structures can only contain one data type

C.  

Both structures can store multiple data types

D.  

Both structures must be 2-dimensional

Discussion 0
Question # 8

Which SQL set operator returns rows that exist in the first SELECT statement answer set but not in the second SELECT statement?

Options:

A.  

EXCEPT

B.  

UNION

C.  

UNION ALL

D.  

INTERSECT

Discussion 0
Question # 9

What is part of the model output for a linear regression?

Options:

A.  

The assignment of each input datum to a cluster

B.  

Coefficients indicating relative impact of the input variables on the outcome

C.  

The set of all rules X -> Y with minimum support and confidence

D.  

Probability score for each possible class label

Discussion 0
Question # 10

When using association rules, what is an itemset?

Options:

A.  

Set of continuous variables that are linked

B.  

Set of discrete variables that are linked

C.  

Support

D.  

Confidence

Discussion 0

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