- A
Amazon Simple Queue Service (SQS)
Why wrong: SQS does not schedule invocations.
- B
AWS Step Functions
Why wrong: Step Functions are for orchestrating multiple services, not simple scheduling.
- C
Amazon CloudWatch Events (EventBridge)
EventBridge can trigger Lambda on a schedule.
- D
Amazon Simple Notification Service (SNS)
Why wrong: SNS does not schedule invocations.
Question 699 of 1,616
Scheduled Lambda Invocation Using EventBridge
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 wants to invoke an AWS Lambda function every hour to perform a maintenance task. Which AWS service should be used 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 CloudWatch Events (EventBridge)
Amazon CloudWatch Events (now part of Amazon EventBridge) is the correct service for scheduling periodic invocations of AWS Lambda functions. It allows you to create a rule with a cron or rate expression (e.g., `rate(1 hour)`) that triggers the Lambda function on a defined schedule. This is the native, serverless way to run code on a recurring timer without managing any 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.
- ✗
Amazon Simple Queue Service (SQS)
Why it's wrong here
SQS does not schedule invocations.
- ✗
AWS Step Functions
Why it's wrong here
Step Functions are for orchestrating multiple services, not simple scheduling.
- ✓
Amazon CloudWatch Events (EventBridge)
Why this is correct
EventBridge can trigger Lambda on a schedule.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Simple Notification Service (SNS)
Why it's wrong here
SNS does not schedule invocations.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'scheduling' with 'messaging' and pick SQS or SNS, not realizing that only EventBridge (CloudWatch Events) provides native cron/rate-based triggers for Lambda.
Detailed technical explanation
How to think about this question
Under the hood, EventBridge uses a distributed scheduler that evaluates cron expressions (e.g., `0 * * * ? *` for every hour) and delivers events to targets like Lambda via a synchronous invocation. A subtle behavior is that EventBridge rules are evaluated in UTC, so developers must account for timezone offsets when using cron expressions. In a real-world scenario, if you need to run a task at a specific local time (e.g., 2 AM EST), you must convert that to UTC or use a custom cron expression with the correct offset.
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 CloudWatch Events (EventBridge) — Amazon CloudWatch Events (now part of Amazon EventBridge) is the correct service for scheduling periodic invocations of AWS Lambda functions. It allows you to create a rule with a cron or rate expression (e.g., `rate(1 hour)`) that triggers the Lambda function on a defined schedule. This is the native, serverless way to run code on a recurring timer without managing any 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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