- A
Amazon EC2 with cron jobs
Why wrong: EC2 with cron requires an always-on instance for scheduling — this wastes compute resources for a job that runs once daily.
- B
AWS Lambda triggered by Amazon EventBridge Scheduler
EventBridge Scheduler invokes Lambda on a schedule without any persistent compute — Lambda runs the database query and terminates, with zero idle costs.
- C
Amazon ECS with scheduled tasks
Why wrong: ECS scheduled tasks work but require container images and more configuration overhead than Lambda for simple query execution.
- D
AWS OpsWorks
Why wrong: OpsWorks is a configuration management service for Chef/Puppet — it's not a job scheduling solution.
Question 225 of 1,024
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 company needs to run scheduled jobs that execute SQL queries on their Amazon RDS database every night. Which AWS service provides fully managed job scheduling without maintaining dedicated compute resources?
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
✓
AWS Lambda triggered by Amazon EventBridge Scheduler
AWS Lambda triggered by Amazon EventBridge Scheduler is the correct choice because EventBridge Scheduler provides fully managed, serverless job scheduling that can invoke Lambda functions to execute SQL queries on Amazon RDS. This eliminates the need to provision or maintain any dedicated compute resources, as the scheduling and execution are handled entirely by AWS.
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.
- ✗
Amazon EC2 with cron jobs
Why it's wrong here
EC2 with cron requires an always-on instance for scheduling — this wastes compute resources for a job that runs once daily.
- ✓
AWS Lambda triggered by Amazon EventBridge Scheduler
Why this is correct
EventBridge Scheduler invokes Lambda on a schedule without any persistent compute — Lambda runs the database query and terminates, with zero idle costs.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon ECS with scheduled tasks
Why it's wrong here
ECS scheduled tasks work but require container images and more configuration overhead than Lambda for simple query execution.
- ✗
AWS OpsWorks
Why it's wrong here
OpsWorks is a configuration management service for Chef/Puppet — it's not a job scheduling solution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'fully managed job scheduling' with services like EC2 cron jobs or ECS scheduled tasks, overlooking that EventBridge Scheduler is the only option that requires zero compute resource management for this specific use case.
Detailed technical explanation
How to think about this question
EventBridge Scheduler uses a cron or rate expression to trigger a target (e.g., Lambda) at specified intervals. Under the hood, it leverages AWS's internal distributed scheduler to ensure high availability and precise execution timing. A real-world scenario is running nightly ETL jobs that query RDS and write results to S3, where using EventBridge Scheduler with Lambda avoids the operational burden of managing a cron server and scales automatically.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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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Cloud Technology and Services — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Lambda triggered by Amazon EventBridge Scheduler — AWS Lambda triggered by Amazon EventBridge Scheduler is the correct choice because EventBridge Scheduler provides fully managed, serverless job scheduling that can invoke Lambda functions to execute SQL queries on Amazon RDS. This eliminates the need to provision or maintain any dedicated compute resources, as the scheduling and execution are handled entirely by AWS.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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