DAC Fundamentals of Data Analytics 2

Question 1

Which type of analytics answers the question 'What happened?'

Accepted Answer

Descriptive analytics

Answer

Descriptive analytics summarizes historical data to describe what happened.

Question 2

A data analyst wants to understand WHY sales dropped last quarter. Which analytics type applies?

Accepted Answer

Diagnostic analytics

Answer

Diagnostic analytics investigates the causes behind an observed outcome.

Question 3

What is the primary purpose of data cleaning?

Accepted Answer

To remove errors, duplicates, and inconsistencies

Answer

Data cleaning improves quality by fixing errors, duplicates, and inconsistencies.

Question 4

Which measure of central tendency is most affected by outliers?

Accepted Answer

Mean

Answer

The mean shifts significantly when extreme values are present.

Question 5

In a dataset, 'structured data' refers to information that is:

Accepted Answer

Organized in rows and columns

Answer

Structured data fits neatly into rows and columns, like a database table.

Data Analytics Certifications (DAC) Practice Test