AWS Certified Big Data - Specialty (#78)

A company is centralizing a large number of unencrypted small files from multiple Amazon S3 buckets. The company needs to verify that the files contain the same data after centralization. Which method meets the requirements?

Compare the S3 Etags from the source and destination objects.
Call the S3 CompareObjects API for the source and destination objects.
Place a HEAD request against the source and destination objects comparing SIG v4 headers.
Compare the size of the source and destination objects.

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