SAP-C02 Design for New Solutions Practice Question
A company is designing a new event-driven architecture using AWS services. The system must process events from multiple sources, filter and route events to different consumers, and ensure that events are processed exactly once. Which THREE services should be used to build this architecture? (Choose three.)
⚠ Common exam trap
Candidates often confuse Amazon Kinesis Data Firehose with Amazon Kinesis Data Streams, assuming Firehose supports exactly-once processing, but Firehose only provides at-least-once delivery and lacks the FIFO ordering and deduplication capabilities required for this use case.
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 functions to consume events from queues and process them.
AWS Lambda functions are correct because they can be triggered by Amazon SQS FIFO queues to process messages one at a time, preserving the order and enabling idempotent processing. Lambda integrates natively with SQS, automatically scaling the number of concurrent executions based on the queue depth, which supports the exactly-once processing requirement when combined with FIFO queues.
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 Kinesis Data Firehose to deliver events to destinations.
Why it's wrong here
Firehose is for streaming data delivery, not event-driven routing.
- ✓
AWS Lambda functions to consume events from queues and process them.
Why this is correct
Lambda can poll SQS queues and process events.
- ✗
AWS AppSync to provide real-time subscriptions for events.
Why it's wrong here
AppSync is for GraphQL, not for event processing architecture.
- ✓
Amazon SQS FIFO queues to ensure exactly-once processing.
Why this is correct
SQS FIFO guarantees exactly-once delivery and ordering.
- ✓
Amazon EventBridge to ingest events and route them based on rules.
Why this is correct
EventBridge acts as a central event bus with filtering and routing.
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 |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-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 SAP-C02 exam.