Use data stores in application development.
4 practice questions under this official exam objective (DVA-C02) — each with the community-verified answer, a full option-by-option explanation and instant feedback.
How to Increase Elasticity for Spiky POS Transaction Writes
This DVA-C02 question tests how to make a write-heavy, bursty API Gateway–Lambda–RDS pipeline elastic on a budget. It establishes that buffering trans
Which design preserves first-order seat priority in serverless app
This DVA-C02 scenario tests ordering and parallel fan-out in a serverless ticketing pipeline built on API Gateway, Lambda and DynamoDB. An SNS FIFO to
Which AWS Services Give ACID Transactions for Item Trades?
A gaming platform that swaps items between two user records in a single rollback-capable unit needs a data store with real multi-item ACID transaction
Caching RDS Read Records Without Schema Changes
When read-only historical records from an Amazon RDS database with custom views and queries slow down under load, the fastest fix that leaves the sche