Dell EMC D-DS-FN-23 practice materials Questions Answers

Exam Code:
D-DS-FN-23
Exam Name:
Dell Certified Data Science Foundations Exam
Last Update:
Jun 01,2026

59 Questions Answers Verified by Experts!


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Dell EMC D-DS-FN-23 Questions for Data Science Foundations Certification Exam 2026

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Page: 1 / 12
Total Questions: 59

Questions & Answers PDF

• Question 1

  

  MapReduce is designed to process data in which way?

  • A few large files split into blocks processed in parallel across multiple machines
  • Many small files processed serially on one machine
  • A few large files split into blocks processed serially on one machine
  • Many small files processed in parallel across multiple machines

  Reveal Answer Answer: A Next Question

• Question 2

  

  What converts SQL-like commands into either Tez, Spark, or MapReduce jobs that are submitted to the Hadoop cluster?

  • Pig
  • HBase
  • Hive
  • Mahout

  Reveal Answer Answer: C Next Question

• Question 3

  

  What are good reasons to develop a naïve Bayes classifier model?

  • Handles correlated variables and handles missing variables
  • Handles categorical variables and handles numeric variables
  • Well calibrated and easy to implement
  • Handles very high dimensional data and resistant to over-fitting

  Reveal Answer Answer: D Next Question

• Question 4

  

  In hypothesis testing, when does a Type I error occur?

  • Null hypothesis is rejected when it is actually false
  • Null hypothesis is rejected when it is actually true
  • Null hypothesis is accepted when it is actually false
  • Null hypothesis is accepted when it is actually true

  Reveal Answer Answer: B Next Question

• Question 5

  

  What are the two data categories that represent qualitative data?

  • Ordinal and interval
  • Nominal and ordinal
  • Ratio and interval
  • Nominal and ratio

  Reveal Answer Answer: B Next Question

• Question 6

  

  After running a density plot you realize that the data has a long tail to the right. What can you do to make the dataset more normally distributed?

  • Use a scatter plot to obtain a better picture
  • Use a histogram to obtain a better picture
  • Apply a square transformation
  • Apply a logarithmic transformation

  Reveal Answer Answer: D Next Question

• Question 7

  

  What are categorized as cluster and workflow management tools for Hadoop?

  • Flume, Sqoop, and Storm
  • Drill, Hive, and HBase
  • Spark, Tez, and Cassandra
  • Ambari, Oozie, and Zookeeper

  Reveal Answer Answer: D Next Question

• Question 8

  

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

  • All population means are equal to each other
  • At least two population means are equal
  • At least two population means are not equal
  • At most k-1 population means are equal

  Reveal Answer Answer: A Next Question

• Question 9

  

  Consider the following text:“Stop!” he shouted. “Don’t go there!”What set of words result from using a tokenizer for punctuation on the text?

  • Stop, he, shouted, don. t. go. there
  • Stop, he shouted, don. t go there
  • Stop, he shouted, dpnt go there
  • Stop, he, shouted, dpnt. go. there

  Reveal Answer Answer: D Next Question

• Question 10

  

  In association rules, given items X and Y, what does lift measure?

  • Percentage of transactions that contain an itemset with X
  • Percentage of transactions with Xthat also contain Y
  • Difference in the probability ofX and Y appearing together compared with expectations as if they were statistically independent
  • How many times more often X and Y occur together than expected if they were statistically independent, expressed as a ratio

  Reveal Answer Answer: D Next Question

Page: 1 / 12
Total Questions: 59

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