Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A mobile app reads the same product details many times per minute from Amazon DynamoDB. The table design is already correct, but repeated reads are still causing noticeable latency. Which service should the team add to improve read performance?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Amazon DAX
DAX adds an in-memory cache in front of DynamoDB to reduce read latency for repeated accesses.
B
Distractor review
Amazon EFS
EFS is a shared file system and does not accelerate DynamoDB read operations.
C
Distractor review
AWS Lambda
Lambda is a compute service and does not provide caching for DynamoDB reads.
D
Distractor review
Amazon SNS
SNS is used for pub/sub messaging and does not reduce latency for repeated database reads.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Amazon DAX — Amazon DAX is the right answer because it is purpose-built to accelerate DynamoDB read-heavy workloads. It keeps frequently accessed items in an in-memory cache, which lowers latency for repeated reads and reduces pressure on the base table. If the partition key design is already good and the problem is mainly repeated lookups, DAX is the most direct improvement. Why others are wrong: EFS is for shared file storage, not caching database reads. Lambda can process data but does not sit in front of DynamoDB as a read cache. SNS is an event distribution service, so it is unrelated to speeding up repeated fetches of product details.
What should I do if I get this SAA-C03 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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