The answer is Amazon EventBridge, the AWS service that enables event-driven architecture by acting as a central event bus. It routes events from AWS services, SaaS applications, and custom applications to configured targets like Lambda functions or Step Functions, decoupling producers from consumers without the need for polling. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of how EventBridge differs from simpler services like SNS or SQS—EventBridge is designed for cross-domain event routing with built-in filtering and schema discovery. A common trap is confusing it with CloudWatch Events, but remember that EventBridge is the evolved, more powerful version that supports third-party SaaS sources. For a quick memory tip, think of EventBridge as the “central switchboard” for events: it listens, filters, and directs traffic based on rules, making it the backbone of event-driven architectures in AWS.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which AWS service enables event-driven architectures by acting as a central event bus that routes events from AWS services, SaaS applications, and custom applications to configured targets?
Why wrong: SNS is a pub/sub service for fan-out messaging — EventBridge is a more sophisticated event bus with content-based routing, SaaS integrations, and schema registry.
B
Amazon SQS
Why wrong: SQS is a message queue for point-to-point communication — it doesn't provide event routing rules or SaaS application integrations.
C
Amazon EventBridge
EventBridge is the serverless event bus for building event-driven architectures, routing events from AWS services, SaaS providers, and custom apps to targets based on declarative rules.
D
AWS Step Functions
Why wrong: Step Functions orchestrates workflow steps — it can be triggered by EventBridge but is not itself an event bus for routing events.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon EventBridge
Amazon EventBridge is a serverless event bus that ingests events from AWS services, SaaS partners, and custom applications, then routes them to targets like Lambda, Step Functions, or SQS based on configurable rules. It decouples event producers from consumers, enabling event-driven architectures without polling or custom middleware. This matches the question's description of a central event bus for cross-domain event routing.
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 SNS
Why it's wrong here
SNS is a pub/sub service for fan-out messaging — EventBridge is a more sophisticated event bus with content-based routing, SaaS integrations, and schema registry.
✗
Amazon SQS
Why it's wrong here
SQS is a message queue for point-to-point communication — it doesn't provide event routing rules or SaaS application integrations.
✓
Amazon EventBridge
Why this is correct
EventBridge is the serverless event bus for building event-driven architectures, routing events from AWS services, SaaS providers, and custom apps to targets based on declarative rules.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Step Functions
Why it's wrong here
Step Functions orchestrates workflow steps — it can be triggered by EventBridge but is not itself an event bus for routing events.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Amazon SNS (pub/sub) with an event bus, but SNS lacks rule-based filtering and multi-source event ingestion from SaaS and custom apps, which is the defining feature of EventBridge.
Detailed technical explanation
How to think about this question
EventBridge uses a default event bus for AWS service events and custom event buses for your own or SaaS events; each event is a JSON payload conforming to a defined schema, and rules use event patterns (e.g., matching on 'source' or 'detail-type') to route to targets. Under the hood, EventBridge leverages CloudWatch Events infrastructure but adds schema registry, archive/replay, and cross-account bus sharing. A real-world scenario is routing GitHub webhook events (via a SaaS integration) to a Lambda function for automated CI/CD triggers, which SNS or SQS alone cannot do without custom glue 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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
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: Amazon EventBridge — Amazon EventBridge is a serverless event bus that ingests events from AWS services, SaaS partners, and custom applications, then routes them to targets like Lambda, Step Functions, or SQS based on configurable rules. It decouples event producers from consumers, enabling event-driven architectures without polling or custom middleware. This matches the question's description of a central event bus for cross-domain event routing.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.