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

Question 1

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

AAll population means are equal to each other

BAt least two population means are equal

CAt least two population means are not equal

DAt most k-1 population means are equal

Answer : A

Question 2

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

ALogistic function

BLognormal distribution function

CPartial autocorrelation function

DNormal distribution function

Answer : C

Question 3

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

ABoolean, integer, and character

BBoolean, table, and character

CBoolean, table, and integer

DList, array, and integer

Answer : A

Question 4

Which phase of the data analytic lifecycle includes conducting project sponsor interviews and drafting a problem statement?

AOperationalize

BModel planning

CModel building

DDiscovery

Answer : D

Question 5

What action occurs during feature selection in the model building phase of the data analytics lifecycle?

ACreate new combinations of attributes

BOverfit the model to improve prediction accuracy

CIdentify the most useful input variables

DSelect a superset of variables to shorten training times

Answer : C

Question 6

MapReduce is designed to process data in which way?

AA few large files split into blocks processed in parallel across multiple machines

BMany small files processed serially on one machine

CA few large files split into blocks processed serially on one machine

DMany small files processed in parallel across multiple machines

Answer : A

Question 7

What is the primary role of a business intelligence analyst on an analytics project?

AExtracts business data from source systems

BEnsures business milestones are met

CProvides business-domain expertise

DDefines business goals for the analytics project

Answer : C

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