Which of the following is an example of an external data source for a data science problem?

Employee attendance records from the HR department

Sales transaction records from the company's database

Publicly available economic indicators from a government website

Customer feedback collected from the company's CRM system

A marketing team wants to divide its customer base into distinct groups based on purchasing behavior, demographics, and engagement metrics so they can tailor campaigns. They do not have predefined customer segments. Which problem type should they use?

Classification to assign customers to known segments

Segmentation/clustering to discover natural groups in the data

Regression to predict customer spending

Optimization to maximize campaign response

Which of the following best describes categorical data?

Data that has no inherent meaning

Data that is always stored as images

Data that represents categories and can be nominal or ordinal

Data that consists of continuous numerical values

Which of the following is an example of ordinal categorical data?

Customer gender: male, female, non-binary

Product colors: red, blue, green

Customer satisfaction ratings: low, medium, high

Types of cuisine: Italian, Chinese, Mexican

CertNexusCertified Data Science Practitioner (CDSP)

Domain 1Objective 3

Objective 1.3 Classify a Question into a Known Data Science Problem CERTIFIED-DATA-SCIENCE-PRACTITIONER Practice Questions (Page 4)

Part of the 1.0 Defining the need to be addressed through the application of data science domain, which accounts for 7-9% of the CERTIFIED-DATA-SCIENCE-PRACTITIONER exam.

45questions here

9free pages

15concepts

7-9%of the exam

Questions 16–20

16foundation · easy
Which of the following is an example of an external data source for a data science problem?
Select an answer first
17foundation · easy
A bank wants to determine whether a loan application should be approved or denied based on applicant characteristics. This is an example of which type of data science problem?
Select an answer first
18application · medium
A marketing team wants to divide its customer base into distinct groups based on purchasing behavior, demographics, and engagement metrics so they can tailor campaigns. They do not have predefined customer segments. Which problem type should they use?
Select an answer first
19foundation · easy
Which of the following best describes categorical data?
Select an answer first
20foundation · easy
Which of the following is an example of ordinal categorical data?
Select an answer first

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