Dell EMC D-DS-FN-23 Exam Practice Test Instant Access

Question 1

When should you consider using multinomial logistic regression over binary logistic regression?

ADependent variable is continuous or dichotomous

BDependent variable is continuous or categorical

CDependent variable has more than two categories

DDependent variable is continuous only

Answer : C

Question 2

What is a benefit of Spark in-memory data processing as opposed to using MapReduce?

AAvoids writing intermediate data to disk, which speeds up processing

BSupports processing unstructured data, which MapReduce does not allow

CRemoves the need to use disks at all, which reduces cost

DAllows parallel processing, which MapReduce does not support

Answer : A

Question 3

How should project results be communicated to executives and the project sponsor?

AFocus on business outcomes and benefits

BDemonstrate your technical prowess to establish credibility

CProvide model performance visualizations

DEmphasize coding details and technical requirements

Answer : A

Question 4

What does a branch represent in a decision tree?

AOutcome of a test on a variable

BOutcome of all prior decisions

CRoot of the tree

DClass label for the decision tree

Answer : A

Question 5

What metrics are used to help calculate relevance in text analysis?

ATF and R square

BIDF and information gain

CInformation gain and confidence interval

DTF and IDF

Answer : D

Question 6

After which phase of the data analytics lifecycle should you determine if the model needs any recalibration?

AModel planning

BData preparation

CDiscovery

DOperationalize

Answer : D

Question 7

You have the data from a popular e-commerce website. You are exploring the time spent (in seconds) on the website by 100,000 customers across 14 different product categories.

What visualization can be used to represent the relationship between time spent and product category?

ARug plot

BScatter plot

CBox and whisker plot

DHexbin plot

Answer : C

Dell EMC Dell Certified Data Science Foundations D-DS-FN-23 Exam Practice Test