This DVA-C02 practice question tests your understanding of development with aws services. 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 developer wants exactly-once processing semantics for commands submitted to a queue where duplicate command IDs must be rejected within five minutes. Which SQS feature is most directly relevant?
Standard queue delay seconds
Why wrong: This does not meet the stated requirement as directly as the correct option.
Dead-letter queue redrive policy
Why wrong: This does not meet the stated requirement as directly as the correct option.
FIFO queue deduplication ID
Correct for the stated requirement.
Visibility timeout extension
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
FIFO queue deduplication ID
FIFO queues support exactly-once processing by using a deduplication ID. When a message with a given deduplication ID is sent, SQS automatically rejects any duplicate within a 5-minute deduplication interval. This directly meets the requirement to reject duplicate command IDs within five minutes.
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.
Standard queue delay seconds
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Dead-letter queue redrive policy
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
FIFO queue deduplication ID
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Visibility timeout extension
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 confuse visibility timeout (which controls reprocessing) with deduplication (which prevents duplicate submissions), leading them to select option D instead of the correct FIFO deduplication ID feature.
Detailed technical explanation
Under the hood, SQS FIFO deduplication uses a SHA-256 hash of the deduplication ID (or message body if not provided) to detect duplicates within a 5-minute window. This is critical for idempotent command processing in event-driven architectures, such as payment transactions, where duplicate submissions must be rejected to prevent double charges.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
The correct answer is: FIFO queue deduplication ID — FIFO queues support exactly-once processing by using a deduplication ID. When a message with a given deduplication ID is sent, SQS automatically rejects any duplicate within a 5-minute deduplication interval. This directly meets the requirement to reject duplicate command IDs within five minutes.
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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