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Google Professional Data Engineer Actual Exam Questions

307 Questions120 Minutes70% Passing Score▣ Updated: Sep 2026

Question 21 of 307

Single answer
Your company uses a proprietary system to send inventory data every 6 hours to a data ingestion service in the cloud. Transmitted data includes a payload of several fields and the timestamp of the transmission. If there are any concerns about a transmission, the system re-transmits the data. How should you deduplicate the data most efficiency?
AAssign global unique identifiers (GUID) to each data entry.
BCompute the hash value of each data entry, and compare it with all historical data.
CStore each data entry as the primary key in a separate database and apply an index.
DMaintain a database table to store the hash value and other metadata for each data entry.
Correct Answer: A

Assign global unique identifiers (GUID) to each data entry.

Explanation

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