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Professional Data Engineer Practice Test - Professional Data Engineer

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Última actualización Jun 6, 2026 Professional Data Engineer Simulador de examen

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Select one answer 4 options

You are building new real-time data warehouse for your company and will use Google BigQuery streaming inserts. There is no guarantee that data will only be sent in once but you do have a unique ID for each row of data and an event timestamp. You want to ensure that duplicates are not included while interactively querying data. Which query type should you use?

A Include ORDER BY DESK on timestamp column and LIMIT to 1. B Use GROUP BY on the unique ID column and timestamp column and SUM on the values. C Use the LAG window function with PARTITION by unique ID along with WHERE LAG IS NOT NULL. D Use the ROW_NUMBER window function with PARTITION by unique ID along with WHERE row equals 1.

Choose the best answer.

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