This DVA-C02 practice question tests your understanding of development with aws services. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An application stores session data in DynamoDB and must expire sessions automatically after a timestamp. Which feature should be used?
DynamoDB global tables
Why wrong: This does not meet the stated requirement as directly as the correct option.
DynamoDB transactions
Why wrong: This does not meet the stated requirement as directly as the correct option.
DynamoDB export to S3
Why wrong: This does not meet the stated requirement as directly as the correct option.
DynamoDB Time to Live
Correct for the stated requirement.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
DynamoDB Time to Live
DynamoDB Time to Live (TTL) allows you to define a timestamp attribute per item, and DynamoDB automatically deletes items once that timestamp is reached. This is the ideal feature for expiring session data without requiring custom scan-and-delete logic, reducing cost and operational overhead.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
DynamoDB global tables
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
DynamoDB transactions
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
DynamoDB export to S3
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
DynamoDB Time to Live
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates may confuse DynamoDB TTL with DynamoDB Streams or Lambda triggers for cleanup, but TTL is the native, serverless mechanism that requires no custom code for expiration.
Detailed technical explanation
TTL works by checking the epoch time value in the specified attribute; when the current time exceeds that value, DynamoDB marks the item for deletion, typically within 48 hours. The deletion is eventually consistent and incurs no additional write cost, making it highly efficient for session stores. A subtle behavior is that TTL-deleted items still appear in queries and scans until fully removed, so applications should filter on the TTL attribute to avoid returning expired data.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
The correct answer is: DynamoDB Time to Live — DynamoDB Time to Live (TTL) allows you to define a timestamp attribute per item, and DynamoDB automatically deletes items once that timestamp is reached. This is the ideal feature for expiring session data without requiring custom scan-and-delete logic, reducing cost and operational overhead.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
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