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Free PDF 2025 EMC D-DS-FN-23: Dell Data Scientist and Big Data Analytics Foundations 2023 Perfect PDF Guide

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EMC Dell Data Scientist and Big Data Analytics Foundations 2023 Sample Questions (Q299-Q304):

NEW QUESTION # 299
Consider the example of an analysis for fraud detection on credit card usage. You will need to ensure higher-risk transactions that may indicate fraudulent credit card activity are retained in your data for analysis, and not dropped as outliers during pre-processing.
What will be your approach for loading data into the analytical sandbox for this analysis?

A. ELT
B. EDW
C. ETL
D. OLTP

Answer: A

NEW QUESTION # 300
What is holdout data?

A. a subset of the provided data set selected at random and used to initially construct the model
B. a subset of the provided data set selected at random and used to validate the model
C. a subset of the provided data set that is removed by the data scientist because it contains data errors
D. a subset of the provided data set that is removed by the data scientist because it contains outliers

Answer: B

NEW QUESTION # 301
You have the following corpus of texts:
"The cat hit the dog."
"The dog bit the mail carrier."
"The mail carrier chased the truck."
"The truck hit the wall while avoiding the dog that chased the cat."
"The cat climbed the wall."
If the tf-idf metric is used to score relevance for search and retrieval, which term has the highest discriminatory power?

A. Chased
B. Dog
C. Bit
D. Truck

Answer: C

NEW QUESTION # 302
You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. All the data currently available has been loaded into an analytics database.
This data includes revenue data, pricing data, and online transaction data. You have completed a thorough univariate analysis of all data and have decided that there are three different models you want to test.
Preliminary results show that all models have equally effective results.
What is the next step?

A. Select the model that demonstrates the most sophisticated technique and accuracy
B. Develop all three models and perform model selection in the next step of the process
C. Identify which model the business owner wants and proceed with that model
D. Prioritize models by complexity and feasibility, and proceed with the most feasible

Answer: D

NEW QUESTION # 303
You have been assigned to run a logistic regression model for each of 100 countries, and all the data is currently stored in a PostgreSQL database.
Which tool/library would you use to produce these models with the least effort?

A. HBase
B. RStudio
C. Mahout
D. MADlib

Answer: D

NEW QUESTION # 304
......

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