- A
AWS Step Functions
Why wrong: Step Functions orchestrates state machines but requires an external trigger to start.
- B
Amazon SNS
Why wrong: SNS is a publish/subscribe messaging service, not a scheduler.
- C
Amazon SQS
Why wrong: SQS is a message queue; it does not schedule invocations.
- D
Amazon EventBridge (CloudWatch Events)
EventBridge can create rules to invoke Lambda functions on a schedule.
Question 701 of 1,616
How to Schedule a Lambda Function Invocation Every Hour
This DVA-C02 practice question tests your understanding of development with aws 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 developer is building a serverless application and wants to invoke an AWS Lambda function every hour to perform a cleanup task. Which AWS service should the developer use to schedule the invocation?
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
✓
Amazon EventBridge (CloudWatch Events)
Amazon EventBridge (formerly CloudWatch Events) is the correct service for scheduling AWS Lambda invocations on a recurring basis. It provides a cron or rate expression to trigger a Lambda function at a defined interval, such as every hour, without the need for managing any servers or additional infrastructure.
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.
- ✗
AWS Step Functions
Why it's wrong here
Step Functions orchestrates state machines but requires an external trigger to start.
- ✗
Amazon SNS
Why it's wrong here
SNS is a publish/subscribe messaging service, not a scheduler.
- ✗
Amazon SQS
Why it's wrong here
SQS is a message queue; it does not schedule invocations.
- ✓
Amazon EventBridge (CloudWatch Events)
Why this is correct
EventBridge can create rules to invoke Lambda functions on a schedule.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon EventBridge with Amazon CloudWatch Logs or assume Step Functions is needed for any time-based workflow, but Step Functions is for stateful orchestration, not simple scheduled invocations.
Detailed technical explanation
How to think about this question
EventBridge uses a 'schedule' rule with a cron or rate expression (e.g., rate(1 hour)) to generate events that target Lambda. Under the hood, EventBridge maintains a distributed scheduler that emits events at the specified intervals, and the Lambda service handles concurrency and scaling automatically. A real-world scenario is a daily database cleanup job where the cron expression must account for timezone offsets to avoid running during peak hours.
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 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.
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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon EventBridge (CloudWatch Events) — Amazon EventBridge (formerly CloudWatch Events) is the correct service for scheduling AWS Lambda invocations on a recurring basis. It provides a cron or rate expression to trigger a Lambda function at a defined interval, such as every hour, without the need for managing any servers or additional infrastructure.
What should I do if I get this DVA-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.
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Last reviewed: Jul 4, 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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