CLF-C02 Cloud Technology and Services Practice Question
A company needs a managed workflow service to coordinate long-running business processes that may require human approval steps and can run for up to one year. Which AWS service handles this?
⚠ Common exam trap
Candidates often confuse AWS Step Functions with Amazon EventBridge, but EventBridge is only for event routing and cannot orchestrate long-running workflows with human approval steps, while Step Functions Standard Workflows are explicitly built for this purpose.
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 (Standard Workflows)
AWS Step Functions Standard Workflows are designed for long-running, durable, and auditable workflows that can run for up to one year, making them ideal for coordinating business processes that require human approval steps. They provide built-in error handling, retries, and state management, which are essential for orchestrating multi-step processes with human intervention.
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 Lambda
Why it's wrong here
AWS Lambda caps execution at 15 minutes, so it cannot host a workflow running up to a year or wait for human approval. It is tempting because Lambda functions are commonly used as workflow task handlers, but Step Functions orchestrates them and persists state between steps.
- ✗
Amazon SQS
Why it's wrong here
Amazon SQS is a message queue that decouples producers and consumers; it holds no workflow state, so it cannot track a process across a year or pause for human approval. It is tempting as a coordination primitive, but Step Functions is the service that models long-running stateful workflows.
- ✓
AWS Step Functions (Standard Workflows)
Why this is correct
Step Functions Standard Workflows support long-running executions lasting up to one year and include callback patterns with wait-for-task tokens, enabling human approval steps. Express Workflows cap at five minutes, so Standard is required for this duration and approval constraint.
- ✗
Amazon EventBridge
Why it's wrong here
Amazon EventBridge routes events to targets based on rules; it does not maintain workflow state or pause for human approval over months. It is tempting because it can trigger Step Functions, but event routing is not the stateful orchestration the scenario requires.
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