The answer is to use DynamoDB Standard-IA table class for infrequently accessed data, combined with DynamoDB Accelerator (DAX) for caching hot items and lifecycle policies to archive older data. This strategy directly addresses the need to optimize DynamoDB costs for infrequent access patterns because Standard-IA provides up to 60% lower storage costs for tables accessed less than once a month, while DAX offloads read-heavy traffic from the main table, preserving performance for critical queries. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of cost-optimization trade-offs between storage and throughput, often appearing as a multi-select question where candidates mistakenly choose TTL or on-demand capacity instead of the IA class. A common trap is assuming all infrequent data should be moved to S3, but compliance retention requirements mean DynamoDB’s native IA class is the correct fit. Memory tip: think “IA for storage, DAX for speed, TTL for deletion” to quickly recall the three pillars of cost-efficient infrequent access.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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 company is migrating a large on-premises NoSQL database to Amazon DynamoDB. The database has tables with uneven access patterns, and some items are accessed infrequently but must be retained for compliance. The company wants to optimize costs without sacrificing performance. Which THREE strategies should the solutions architect recommend? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use DynamoDB Standard-Infrequent Access (Standard-IA) table class for tables with infrequently accessed data.
DynamoDB Standard-IA table class is designed for tables where data is accessed less than once a month, offering lower storage costs than the Standard table class while maintaining the same single-digit millisecond latency. For the described scenario, where some items are accessed infrequently but must be retained for compliance, Standard-IA reduces storage costs without impacting performance for the infrequent access patterns.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use DynamoDB Standard-Infrequent Access (Standard-IA) table class for tables with infrequently accessed data.
Why this is correct
Standard-IA offers lower storage costs for infrequent access.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use DynamoDB Time to Live (TTL) to automatically delete expired compliance data.
Read the scenario before looking for a memorised answer.
✓
Use DynamoDB Accelerator (DAX) to cache frequently accessed items.
Why this is correct
DAX reduces read capacity consumption for repeated reads.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable auto scaling and set a fixed provisioned capacity to avoid cost spikes.
Why it's wrong here
Fixed capacity may lead to throttling or over-provisioning.
✗
Increase the write capacity units to handle peak loads and reduce latency.
Why it's wrong here
Increasing write capacity increases cost; it's not an optimization.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse DynamoDB TTL with a mechanism for cost optimization on compliance data, but TTL is for deletion, not retention; the question requires retaining data for compliance, so TTL would be used only if the compliance period has expired, making it a valid strategy for deleting data that is no longer needed.
Detailed technical explanation
How to think about this question
DynamoDB Standard-IA uses the same internal storage engine as the Standard table class but with a different pricing model: lower per-GB storage cost ($0.10/GB vs $0.25/GB) but higher per-request cost ($0.001 per 1K reads vs $0.0005 per 1K reads). This makes it ideal for tables where the access ratio is less than 15% of the data per month, as the storage savings outweigh the increased request costs. TTL works by marking items with a timestamp attribute; DynamoDB automatically deletes expired items within 48 hours, freeing storage and reducing costs without application-level logic.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use DynamoDB Standard-Infrequent Access (Standard-IA) table class for tables with infrequently accessed data. — DynamoDB Standard-IA table class is designed for tables where data is accessed less than once a month, offering lower storage costs than the Standard table class while maintaining the same single-digit millisecond latency. For the described scenario, where some items are accessed infrequently but must be retained for compliance, Standard-IA reduces storage costs without impacting performance for the infrequent access patterns.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PAS-C01 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 PAS-C01 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.