DBS-C01 Monitoring and Troubleshooting Practice Question
A company is using Amazon DynamoDB and has enabled DynamoDB Streams. The application needs to process stream records in real-time. Which AWS service can be used to invoke a Lambda function automatically for each stream record?
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
DynamoDB Streams can be directly integrated with AWS Lambda, enabling automatic invocation of a Lambda function for each stream record in near real-time. This is the natural choice for processing stream records without additional services. Option A (Amazon Kinesis Data Firehose) is used to load streaming data into data stores, not to invoke Lambda. Option B (Amazon SQS) is a message queue service; DynamoDB Streams does not directly integrate with SQS, and Lambda would still be needed to poll or process. Option C (AWS Step Functions) orchestrates workflows but does not directly trigger from DynamoDB Streams without Lambda.
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
Why it's wrong here
Amazon Kinesis Data Firehose is used to load streaming data into data stores and analytics tools, but it cannot directly invoke Lambda from DynamoDB Streams.
- ✗
Amazon Simple Queue Service (SQS)
Why it's wrong here
Amazon SQS is a message queue service, but DynamoDB Streams does not integrate directly with SQS; a Lambda function would be needed to poll or process the stream.
- ✗
AWS Step Functions
Why it's wrong here
AWS Step Functions orchestrates workflows but does not directly trigger from DynamoDB Streams without a Lambda intermediary.
- ✓
AWS Lambda
Why this is correct
AWS Lambda can be directly integrated with DynamoDB Streams to automatically process each stream record in real-time.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 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 DBS-C01 exam.