Crucial Exams

AWS Certified Data Engineer Associate DEA-C01 Practice Question

An analytics team loads daily data into a fact table in Amazon Redshift by running a COPY command from Amazon S3. During the 10-minute load window, business users have occasionally queried the table and received incomplete results. The team must guarantee that no other session can read or write the table until the load finishes, using the simplest approach that requires no additional AWS services. Which action meets these requirements?

  • Begin a transaction, execute LOCK <table_name>; run the COPY, then commit.

  • Pause the Amazon Redshift cluster during the load window and resume it when the COPY finishes.

  • Set the WLM queue to SERIALIZABLE isolation level before starting the COPY operation.

  • Load data into a staging table, then atomically rename the staging table to the target table after the COPY completes.

AWS Certified Data Engineer Associate DEA-C01
Data Store Management
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