Question 1,114 of 1,746
Design for New SolutionsmediumMultiple ChoiceObjective-mapped

Choosing S3 Intelligent-Tiering for Athena Data Lake with Unpredictable Access Patterns

This SAP-C02 practice question tests your understanding of design for new solutions. 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 designing a data lake on Amazon S3. Data is ingested from various sources, including IoT devices, and must be stored in a cost-effective manner. The data access patterns are unpredictable; some data is accessed frequently for a few days, then rarely accessed. The company wants to minimize storage costs while ensuring data is available within minutes when accessed. Which storage class should they use for the data?

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.

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

S3 Intelligent-Tiering

S3 Intelligent-Tiering is the correct choice because it automatically moves data between two access tiers (frequent and infrequent access) based on changing access patterns, with no retrieval fees. This matches the unpredictable access pattern described—data accessed frequently for a few days then rarely—while ensuring data is available within minutes (milliseconds latency). It minimizes storage costs by charging lower rates for infrequently accessed data without requiring manual lifecycle management.

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.

  • S3 Standard

    Why it's wrong here

    Standard is expensive for data that becomes rarely accessed.

  • S3 Intelligent-Tiering

    Why this is correct

    Automatically optimizes costs for unknown or changing access patterns, with millisecond retrieval.

    Clue confirmation

    The clue word "minimum / minimize" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • S3 Glacier Deep Archive

    Why it's wrong here

    Retrieval takes hours, not minutes.

  • S3 One Zone-Infrequent Access

    Why it's wrong here

    Not resilient; data loss if AZ fails.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often choose S3 Standard for its low latency and availability, overlooking the cost savings of Intelligent-Tiering for unpredictable access patterns, or mistakenly select S3 Glacier Deep Archive thinking it is the cheapest option without considering the retrieval time requirement of 'within minutes'.

Detailed technical explanation

How to think about this question

S3 Intelligent-Tiering monitors access patterns at the object level (minimum 30 days of monitoring) and moves objects between the Frequent Access tier (same cost as S3 Standard) and the Infrequent Access tier (similar cost to S3 Standard-IA) with a small monthly monitoring and automation fee per object. It also supports an optional Archive Instant Access tier for objects that become rarely accessed but still need millisecond retrieval, and can automatically transition to S3 Glacier Deep Archive after 180+ days of no access. This is ideal for IoT data streams where access patterns are unpredictable, as it eliminates the need to manually define lifecycle rules or predict future access behavior.

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.

Quick reference

AWS S3 Storage Class Comparison

Storage ClassMin DurationRetrievalUse Case
S3 StandardNoneImmediateFrequently accessed data
S3 Standard-IA30 daysImmediateInfrequent access, rapid retrieval
S3 One Zone-IA30 daysImmediateNon-critical infrequent data
S3 Intelligent-TieringNoneImmediate–hoursUnknown or changing access patterns
S3 Glacier Instant90 daysMillisecondsArchive with instant retrieval
S3 Glacier Flexible90 daysMinutes–hoursArchive, flexible retrieval
S3 Glacier Deep Archive180 daysHoursLong-term compliance archive

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.

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FAQ

Questions learners often ask

What does this SAP-C02 question test?

Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: S3 Intelligent-Tiering — S3 Intelligent-Tiering is the correct choice because it automatically moves data between two access tiers (frequent and infrequent access) based on changing access patterns, with no retrieval fees. This matches the unpredictable access pattern described—data accessed frequently for a few days then rarely—while ensuring data is available within minutes (milliseconds latency). It minimizes storage costs by charging lower rates for infrequently accessed data without requiring manual lifecycle management.

What should I do if I get this SAP-C02 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

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.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

1 more ways this is tested on SAP-C02

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 company is building a new data lake on AWS. The data is stored in Amazon S3 and will be queried using Amazon Athena. The company wants to minimize query costs. Which S3 storage class should the company use for the data?

easy
  • A.S3 Intelligent-Tiering
  • B.S3 Standard
  • C.S3 Glacier Deep Archive
  • D.S3 One Zone-IA

Why B: S3 Standard is the most suitable storage class for Athena queries because it provides low-latency access with no retrieval charges. Athena query costs are based on the amount of data scanned, not on the storage class. However, other storage classes like S3 Intelligent-Tiering can incur monitoring fees and may transition data to colder tiers, resulting in retrieval costs that increase total cost of ownership. S3 Glacier Deep Archive and S3 One Zone-IA are not optimal due to retrieval delays and costs or reduced durability. Therefore, to minimize query costs, S3 Standard is the best choice among the options.

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Last reviewed: Jul 4, 2026

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This SAP-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 SAP-C02 exam.