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.
A developer is using Amazon DynamoDB to store session data for a web application. The application reads and writes a single item per user session. The traffic pattern shows occasional spikes. The developer wants to minimize read and write costs. Which DynamoDB capacity mode should the developer choose?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Reserved capacity
Why wrong: Requires upfront commitment, not suitable for variable traffic.
On-demand capacity
Pay-per-request, handles spikes without throttling.
Provisioned capacity with manual scaling
Why wrong: Manual scaling is not responsive to spikes.
Provisioned capacity with auto scaling
Why wrong: Auto scaling may not react fast enough for spikes.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
On-demand capacity
Option D is correct because on-demand capacity handles spikes automatically and is cost-effective for unpredictable traffic. Option A is wrong because provisioned capacity requires manual scaling and may throttle during spikes. Option B is wrong because reserved capacity is for predictable workloads. Option C is wrong because auto scaling adds latency and cost during scaling.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Reserved capacity
Why it's wrong here
Requires upfront commitment, not suitable for variable traffic.
On-demand capacity
Why this is correct
Pay-per-request, handles spikes without throttling.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Provisioned capacity with manual scaling
Why it's wrong here
Manual scaling is not responsive to spikes.
Provisioned capacity with auto scaling
Why it's wrong here
Auto scaling may not react fast enough for spikes.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DVA-C02 NAT questions on configuration and troubleshooting.
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Static NAT maps one inside address to one outside address..
The correct answer is: On-demand capacity — Option D is correct because on-demand capacity handles spikes automatically and is cost-effective for unpredictable traffic. Option A is wrong because provisioned capacity requires manual scaling and may throttle during spikes. Option B is wrong because reserved capacity is for predictable workloads. Option C is wrong because auto scaling adds latency and cost during scaling.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DVA-C02 NAT questions on configuration and troubleshooting.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 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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