AWS Certified Data Engineer - Associate
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You are designing a data model for AWS Lake Formation to store financial transactions from various sources. The transaction data includes transaction IDs, timestamps, amounts, and account IDs. The model must support schema evolution to accommodate changes in transaction data formats. Which of the following strategies would be most effective?
A
Use a fixed schema with predefined columns for all possible transaction data fields.
B
Use a schema-on-read approach where each transaction entry is stored as a JSON object.
C
Create a new table for each new transaction data format.
D
Use a schema-less database to store transaction data.