Reference Duplicate Quiz

Quiz covering Transform and Load the Data

Questions in this quiz

A preview of the 5 questions covered. Start the quiz above to answer them, check your score, and read the explanations.

1. 1

   What is the primary purpose of identifying duplicates during the data transformation phase?

2. 2

   When cleaning a customer dataset, you find multiple entries for the same person with slightly different email formatting. Which action is the most appropriate approach to deduplication?

3. 3

   You are performing an ETL process and notice that a 'TransactionID' column has duplicate values. What should be your first step before deleting these rows?

4. 4

   In a SQL-based transformation, which clause or function is most commonly used to identify duplicate records based on a specific subset of columns?

5. 5

   When handling duplicates in a large-scale streaming data pipeline, why is 'fuzzy matching' often preferred over exact matching?