- A
Use a scheduled Amazon EC2 Auto Scaling group that keeps a minimum of one instance running at all times.
Why wrong: Keeping a minimum instance reduces savings and still requires EC2 operational management.
- B
Use an EventBridge schedule to run the report as an Amazon ECS task on AWS Fargate and write results to S3.
Fargate allows the containerized job to run only when scheduled, so the team pays for task runtime instead of keeping an EC2 instance always on.
- C
Use AWS Lambda triggered by an EventBridge schedule at 02:00 UTC and write results to S3.
Why wrong: Lambda has a 15-minute maximum runtime, so it cannot reliably handle a workload that may take up to 45 minutes.
- D
Use an EMR cluster provisioned daily with manual teardown to ensure the instance is always available before 02:00.
Why wrong: EMR provisioning overhead and operational complexity are typically unnecessary for a daily report process.
SAA-C03 Design Cost-Optimized Architectures Practice Question
This SAA-C03 practice question tests your understanding of design cost-optimized architectures. 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. A key principle to apply: aWS Fargate provides serverless compute for containers, eliminating EC2 instance management.. 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 marketing team runs a report-generation process that must execute once per day at 02:00 UTC. It usually completes in 10315 minutes, but sometimes takes up to 45 minutes due to varying data volumes. They currently run the workload on an EC2 instance that is always on, which wastes money during off-hours. The team wants to minimize operational overhead and pay mainly for actual execution time.
What is the best architecture choice?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue:
"always"Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
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
Use an EventBridge schedule to run the report as an Amazon ECS task on AWS Fargate and write results to S3.
Option B is correct because AWS Fargate allows the report-generation task to run as an Amazon ECS task triggered by an EventBridge schedule, eliminating the need for an always-on EC2 instance. Fargate charges only for the vCPU and memory resources consumed during the task's execution (typically 10–45 minutes), which aligns with the team's goal of minimizing operational overhead and paying mainly for actual execution time. Writing results to S3 provides durable, cost-effective storage without managing infrastructure.
Key principle: AWS Fargate provides serverless compute for containers, eliminating EC2 instance management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a scheduled Amazon EC2 Auto Scaling group that keeps a minimum of one instance running at all times.
Why it's wrong here
Keeping a minimum instance reduces savings and still requires EC2 operational management.
- ✓
Use an EventBridge schedule to run the report as an Amazon ECS task on AWS Fargate and write results to S3.
Why this is correct
Fargate allows the containerized job to run only when scheduled, so the team pays for task runtime instead of keeping an EC2 instance always on.
Clue confirmation
The clue words "best", "always", "minimum / minimize" in the question point toward this answer.
Related concept
AWS Fargate provides serverless compute for containers, eliminating EC2 instance management.
- ✗
Use AWS Lambda triggered by an EventBridge schedule at 02:00 UTC and write results to S3.
Why it's wrong here
Lambda has a 15-minute maximum runtime, so it cannot reliably handle a workload that may take up to 45 minutes.
- ✗
Use an EMR cluster provisioned daily with manual teardown to ensure the instance is always available before 02:00.
Why it's wrong here
EMR provisioning overhead and operational complexity are typically unnecessary for a daily report process.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose Lambda for scheduled tasks without checking the execution duration limit, overlooking that Lambda's 15-minute timeout makes it unsuitable for processes that can take up to 45 minutes.
Detailed technical explanation
How to think about this question
Amazon ECS on Fargate uses a 'task' as the atomic unit of compute, which can be configured with a specific task role for S3 access and a CloudWatch Logs group for debugging. The EventBridge schedule invokes the RunTask API action, and Fargate tasks can run for up to 24 hours, comfortably accommodating the 45-minute maximum duration. Under the hood, Fargate allocates a lightweight micro-VM per task using AWS Nitro System, ensuring strong isolation and predictable billing per second of resource usage.
KKey Concepts to Remember
- AWS Fargate provides serverless compute for containers, eliminating EC2 instance management.
- EventBridge schedules can trigger ECS tasks at specific times or intervals.
- Fargate charges only for the duration of task execution, not for idle time.
- ECS on Fargate supports long-running batch jobs, unlike AWS Lambda's 15-minute limit.
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
AWS Fargate provides serverless compute for containers, eliminating EC2 instance management.
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.
What to study next
Got this wrong? Here's your next step.
Review aWS Fargate provides serverless compute for containers, eliminating EC2 instance management., then practise related SAA-C03 questions on the same topic to reinforce the concept.
- →
Design Cost-Optimized Architectures — study guide chapter
Learn the concepts, then practise the questions
- →
Design Cost-Optimized Architectures practice questions
Targeted practice on this topic area only
- →
All SAA-C03 questions
1,040 questions across all exam domains
- →
SAA-C03 study guide
Full concept coverage aligned to exam objectives
- →
SAA-C03 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related SAA-C03 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design Secure Architectures practice questions
Practise SAA-C03 questions linked to Design Secure Architectures.
Design Resilient Architectures practice questions
Practise SAA-C03 questions linked to Design Resilient Architectures.
Design High-Performing Architectures practice questions
Practise SAA-C03 questions linked to Design High-Performing Architectures.
Design Cost-Optimized Architectures practice questions
Practise SAA-C03 questions linked to Design Cost-Optimized Architectures.
SAA-C03 VPC practice questions
Practise SAA-C03 questions linked to SAA-C03 VPC.
SAA-C03 S3 lifecycle policy questions
Practise SAA-C03 questions linked to SAA-C03 S3 lifecycle policy questions.
SAA-C03 RDS Multi-AZ questions
Practise SAA-C03 questions linked to SAA-C03 RDS Multi-AZ questions.
SAA-C03 IAM policy practice questions
Practise SAA-C03 questions linked to SAA-C03 IAM policy.
SAA-C03 Route 53 failover questions
Practise SAA-C03 questions linked to SAA-C03 Route 53 failover questions.
SAA-C03 CloudFront practice questions
Practise SAA-C03 questions linked to SAA-C03 CloudFront.
SAA-C03 NAT gateway questions
Practise SAA-C03 questions linked to SAA-C03 NAT gateway questions.
SAA-C03 VPC endpoint questions
Practise SAA-C03 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Start a free SAA-C03 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Cost-Optimized Architectures — This question tests Design Cost-Optimized Architectures — AWS Fargate provides serverless compute for containers, eliminating EC2 instance management..
What is the correct answer to this question?
The correct answer is: Use an EventBridge schedule to run the report as an Amazon ECS task on AWS Fargate and write results to S3. — Option B is correct because AWS Fargate allows the report-generation task to run as an Amazon ECS task triggered by an EventBridge schedule, eliminating the need for an always-on EC2 instance. Fargate charges only for the vCPU and memory resources consumed during the task's execution (typically 10–45 minutes), which aligns with the team's goal of minimizing operational overhead and paying mainly for actual execution time. Writing results to S3 provides durable, cost-effective storage without managing infrastructure.
What should I do if I get this SAA-C03 question wrong?
Review aWS Fargate provides serverless compute for containers, eliminating EC2 instance management., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best", "always", "minimum / minimize". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
AWS Fargate provides serverless compute for containers, eliminating EC2 instance management.
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 →
Keep practising
More SAA-C03 practice questions
- A content publishing system uses Lambda functions that call an unreliable third-party API. Failed events must be retaine…
- A startup runs two EC2-based workloads in the same AWS Region. Its customer-facing API is always on, and its nightly vid…
- A warehouse integration service must use shared file storage across Linux EC2 instances in multiple Availability Zones.…
- A team runs a stateless web app on Amazon EC2 behind an Application Load Balancer. During traffic spikes, new EC2 instan…
- A service in private subnets downloads product images from Amazon S3 and stores job state in DynamoDB. A NAT Gateway is…
- A static site is hosted in Amazon S3 and delivered by CloudFront. After a frontend release, the same JavaScript bundles…
Last reviewed: Jun 11, 2026
This SAA-C03 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 SAA-C03 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.