Your organization wants to migrate a petabyte-scale data warehouse to BigQuery. Which GCP service should be used for the most efficient and secure data transfer?
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Correct answer: Transfer Appliance.
Why this is the answer
*Explanation: * _Transfer Appliance._ Transfer Appliance is the correct choice for efficiently and securely transferring petabyte-scale data to BigQuery. It is designed for large-scale, offline data transfers, making it suitable for this use case. BigQuery Data Transfer Service is not optimized for such massive transfers. Cloud Storage Transfer Service, Cloud Pub/Sub, gsutil with CMEK, and Datastream are not ideal for this specific scenario, as they are not designed for petabyte-scale data warehouse transfers.*
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