- A
Create two separate feature groups: one online and one offline
Why wrong: Unnecessary complexity; a single feature group can have both stores.
- B
Create a feature group with both online and offline stores enabled
Both stores can be configured; online for real-time, offline for training.
- C
Create a feature group with only an online store enabled
Why wrong: Online store alone is good for real-time but not for historical training (no point-in-time queries).
- D
Create a feature group with only an offline store enabled
Why wrong: Offline store alone does not support low-latency real-time reads.
Question 199 of 1,000
hardMultiple ChoiceObjective-mapped
Choosing SageMaker Feature Store: Online vs Offline for Real-Time and Training
This MLA-C01 practice question tests your understanding of mla-c01 exam topics. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 machine learning team is building a feature store using Amazon SageMaker Feature Store. They need to store features that support both real-time inference (low latency) and historical training. Which configuration should they choose?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a feature group with both online and offline stores enabled
SageMaker Feature Store supports both online and offline stores. The online store (backed by DynamoDB) provides low-latency access for real-time inference, while the offline store (S3) stores historical data for training. Enabling both satisfies the requirement.
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.
- ✗
Create two separate feature groups: one online and one offline
Why it's wrong here
Unnecessary complexity; a single feature group can have both stores.
- ✓
Create a feature group with both online and offline stores enabled
Why this is correct
Both stores can be configured; online for real-time, offline for training.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a feature group with only an online store enabled
Why it's wrong here
Online store alone is good for real-time but not for historical training (no point-in-time queries).
- ✗
Create a feature group with only an offline store enabled
Why it's wrong here
Offline store alone does not support low-latency real-time reads.
Common exam traps
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.
Detailed technical explanation
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.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Identify which MLA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this MLA-C01 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Create a feature group with both online and offline stores enabled — SageMaker Feature Store supports both online and offline stores. The online store (backed by DynamoDB) provides low-latency access for real-time inference, while the offline store (S3) stores historical data for training. Enabling both satisfies the requirement.
What should I do if I get this MLA-C01 question wrong?
Identify which MLA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
Same concept, more angles
2 more ways this is tested on MLA-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A data engineer is building a feature store using Amazon SageMaker Feature Store. The team needs to store features that are updated frequently and require low-latency retrieval for real-time inference. Which type of store should the engineer use?
easy- A.Both online and offline store
- B.Offline store
- ✓ C.Online store
- D.Amazon DynamoDB directly
Why C: Online store provides low-latency access for real-time inference. Offline store is for batch analytics.
Variation 2. A company uses Amazon SageMaker Feature Store to manage features for real-time inference. They need to store customer transaction data that is updated frequently and must be available for low-latency lookups. Which type of Feature Store should be used?
medium- A.Neither; use S3 directly
- B.Both online and offline store
- ✓ C.Online store only
- D.Offline store only
Why C: The online store is designed for low-latency access for real-time inference. The offline store is used for batch training and analytics. Option B is correct. Options A, C, and D are incorrect because the offline store is not suitable for low-latency lookups.
Last reviewed: Jul 4, 2026
This MLA-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 MLA-C01 exam.
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