A telecom company is preparing call detail records for churn analysis. The data contains missing values for some customer demographics. What is the MOST appropriate data preparation action?

Impute missing values using a suitable method

Ignore the missing values and proceed

Delete all records with missing values

Replace missing values with zeros

A healthcare organization is preparing patient data from multiple hospitals. Each hospital uses a different coding system for diagnoses. What is the MOST critical data preparation activity to enable combined analysis?

Data cleaning to remove duplicates

Data transformation to map codes to a common standard

Data reduction to limit data size

Data profiling to assess quality

In the data preparation phase, what is a typical responsibility of a data scientist?

Approving the final model for production deployment

Setting up the cloud infrastructure for data storage

Creating the project budget and timeline

Defining the data quality rules and validation checks

Which of the following is an example of data transformation during data preparation?

Querying a database to retrieve raw records

Sending a report to the management team

Choosing a machine learning algorithm

Scaling numerical features to a common range

An e-commerce company is preparing clickstream data for user behavior analysis. The data contains timestamps in different time zones. What is the PRIMARY data preparation activity to ensure accurate analysis?

Data transformation to standardize time zones

Data reduction to minimize data size

Data cleaning to remove outliers

Data integration to combine sources

Dell Data Science Foundations

Domain 2Objective 3

Data Preparation - Describe Details of This Phase, Including Activities and Associated Roles DATA-SCIENCE-FOUNDATIONS Practice Questions (Page 2)

Part of the Data Analytics Lifecycle domain, which accounts for 8% of the DATA-SCIENCE-FOUNDATIONS exam.

19questions here

4free pages

3concepts

8%of the exam

Questions 6–10

6application · medium
A telecom company is preparing call detail records for churn analysis. The data contains missing values for some customer demographics. What is the MOST appropriate data preparation action?
Select an answer first
7application · medium
A healthcare organization is preparing patient data from multiple hospitals. Each hospital uses a different coding system for diagnoses. What is the MOST critical data preparation activity to enable combined analysis?
Select an answer first
8foundation · easy
In the data preparation phase, what is a typical responsibility of a data scientist?
Select an answer first
9foundation · easy
Which of the following is an example of data transformation during data preparation?
Select an answer first
10application · medium
An e-commerce company is preparing clickstream data for user behavior analysis. The data contains timestamps in different time zones. What is the PRIMARY data preparation activity to ensure accurate analysis?
Select an answer first

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