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Replacement: DVA-C03 Practice Exam
Question 26 of 167
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Select one answer.
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B : Correct — DynamoDB is serverless, scales automatically with IoT traffic spikes, and provides fast key lookups. Checking the unique identifier before processing ensures idempotency — duplicate requests are detected and skipped without data loss or inconsistency.
Yeah, I thought of C as well... but the cache entries will be evicted sooner rather than later, and thus the new entry will be processed again. Cache is just temporary
A) Eliminated - RDS is not as scalable as DynamoDB for handling unpredictable spikes in traffic. D) Eliminated - Memcached is an in-memory cache that is not designed for persistence or durability. If the instance is restarted or the data is evicted due to memory constraints, the identifiers could be lost