Free AWS Certified Developer Associate DVA-C02 Practice Question

A query operation in Amazon DynamoDB is the most efficient way to retrieve data by using a partition key (and an optional sort key) to narrow down the results to the items that match exactly what you're looking for. This operation finds items within a table or a secondary index using the primary key attribute values specified by you, leading to faster and more efficient data retrieval compared to a scan operation which reads every item in the table or index and can consume more read throughput, resulting in higher latency and cost.