- A
AWS Step Functions
Correct. AWS Step Functions is a fully managed service that lets you coordinate multiple AWS services into stateful, scalable workflows. It supports sequencing, parallel execution, error handling, and retries, making it ideal for orchestrating a series of Lambda functions in a defined order.
- B
Amazon Simple Queue Service (SQS)
Why wrong: Incorrect. Amazon SQS is a message queuing service used for decoupling application components and buffering requests. It does not provide workflow orchestration, state management, or the ability to define and execute a sequence of steps with error handling.
- C
AWS Batch
Why wrong: Incorrect. AWS Batch is a service for running batch computing workloads at scale, typically on EC2 or Fargate. It is not designed for orchestrating event-driven serverless functions in a predefined sequence, nor does it natively integrate with Lambda for step coordination.
- D
Amazon EventBridge
Why wrong: Incorrect. Amazon EventBridge is a serverless event bus that connects application data from various sources and routes events to targets like Lambda. While it can trigger functions based on events, it does not provide built-in state management or the ability to define and execute an ordered workflow with retry logic.
Quick Answer
The answer is AWS Step Functions. This serverless workflow orchestration service is the correct choice because it directly coordinates multiple Lambda functions in a defined sequence, manages application state between steps, and provides built-in error handling with automatic retry logic using Amazon States Language. For the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of how Step Functions fits into the serverless ecosystem as a workflow coordinator, often contrasted with services like Amazon Simple Queue Service or Amazon EventBridge, which handle messaging or event routing but lack native state management and retry policies. A common trap is confusing Step Functions with a simple function trigger; remember that Step Functions is for orchestrating multi-step workflows with conditional logic, not just firing one function. Memory tip: think of Step Functions as the "conductor" of your serverless orchestra, ensuring each Lambda plays its part in the right order and recovers from wrong notes.
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 has a serverless application built with AWS Lambda. The application requires a series of functions to run in a specific order: after a user uploads a file, a validation function must run, then a processing function, and finally a metadata storage function. The company needs a service to coordinate these steps, manage state, handle errors, and automatically retry failed functions based on defined conditions. Which AWS service should the company use to meet these requirements?
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 Step Functions
AWS Step Functions is a serverless orchestration service that lets you coordinate multiple AWS services into a flexible, visual workflow. It directly meets the requirement to run Lambda functions in a specific order, manage state between steps, handle errors with built-in retry logic, and define conditions for automatic retries using Amazon States Language (ASL). This makes it the ideal choice for orchestrating a multi-step serverless application with error handling and state management.
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 this is correct
Correct. AWS Step Functions is a fully managed service that lets you coordinate multiple AWS services into stateful, scalable workflows. It supports sequencing, parallel execution, error handling, and retries, making it ideal for orchestrating a series of Lambda functions in a defined order.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Simple Queue Service (SQS)
Why it's wrong here
Incorrect. Amazon SQS is a message queuing service used for decoupling application components and buffering requests. It does not provide workflow orchestration, state management, or the ability to define and execute a sequence of steps with error handling.
- ✗
AWS Batch
Why it's wrong here
Incorrect. AWS Batch is a service for running batch computing workloads at scale, typically on EC2 or Fargate. It is not designed for orchestrating event-driven serverless functions in a predefined sequence, nor does it natively integrate with Lambda for step coordination.
- ✗
Amazon EventBridge
Why it's wrong here
Incorrect. Amazon EventBridge is a serverless event bus that connects application data from various sources and routes events to targets like Lambda. While it can trigger functions based on events, it does not provide built-in state management or the ability to define and execute an ordered workflow with retry logic.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between orchestration (Step Functions) and simple messaging (SQS) or batch processing (AWS Batch), so the trap here is that candidates might choose SQS thinking it can coordinate steps, but SQS lacks workflow state management and built-in retry conditions.
Detailed technical explanation
How to think about this question
AWS Step Functions uses Amazon States Language (ASL) to define state machines, which can include sequential steps, parallel branches, and choice states. Under the hood, it manages execution history and state transitions, allowing you to implement complex retry policies with exponential backoff and maximum retry counts. In a real-world scenario, if the validation function fails due to a transient error, Step Functions can automatically retry it up to 3 times with a 5-second delay before routing to a fallback step, all without custom code.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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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 Step Functions — AWS Step Functions is a serverless orchestration service that lets you coordinate multiple AWS services into a flexible, visual workflow. It directly meets the requirement to run Lambda functions in a specific order, manage state between steps, handle errors with built-in retry logic, and define conditions for automatic retries using Amazon States Language (ASL). This makes it the ideal choice for orchestrating a multi-step serverless application with error handling and state management.
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
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Last reviewed: Jun 30, 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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