This DVA-C02 practice question tests your understanding of security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 needs to prevent accidental public access to all S3 buckets in an account. Which account-level control should be enabled?
S3 Transfer Acceleration
Why wrong: This does not meet the stated requirement as directly as the correct option.
S3 Block Public Access
Correct for the stated requirement.
S3 Inventory
Why wrong: This does not meet the stated requirement as directly as the correct option.
S3 Object Lambda
Why wrong: This does not meet the stated requirement as directly as the correct option.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
S3 Block Public Access
S3 Block Public Access is an account-level control that provides a centralized way to enforce that no S3 buckets or objects in the account can be made publicly accessible, regardless of individual bucket policies or ACLs. This setting overrides any bucket-level public access settings, effectively preventing accidental exposure of data to the internet.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
S3 Transfer Acceleration
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
S3 Block Public Access
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
S3 Inventory
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
S3 Object Lambda
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Common exam traps
The trap here is that candidates may confuse bucket-level controls (like bucket policies or ACLs) with account-level controls, or mistakenly think features like Transfer Acceleration or Inventory provide security, when only S3 Block Public Access offers a centralized, account-wide safeguard against public exposure.
Detailed technical explanation
S3 Block Public Access can be applied at the account level via the AWS Organizations service control policy (SCP) or directly in the S3 console, and it consists of four settings: BlockPublicAcls, IgnorePublicAcls, BlockPublicPolicy, and RestrictPublicBuckets. When enabled at the account level, these settings cascade to all existing and future buckets, overriding any bucket-level public access settings and preventing even the root user from making buckets public. This is critical for organizations that must comply with regulations like GDPR or HIPAA, where a single misconfigured bucket could lead to a data breach.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
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FAQ
Security — This question tests Security — Read the scenario before looking for a memorised answer..
The correct answer is: S3 Block Public Access — S3 Block Public Access is an account-level control that provides a centralized way to enforce that no S3 buckets or objects in the account can be made publicly accessible, regardless of individual bucket policies or ACLs. This setting overrides any bucket-level public access settings, effectively preventing accidental exposure of data to the internet.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 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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