DBS-C01 Deployment and Migration Practice Question
A developer is deploying an application that uses Amazon DynamoDB as its database. The application experiences sudden spikes in traffic. Which DynamoDB feature should the developer use to handle the spikes without manual intervention?
⚠ Common exam trap
A common mix-up: candidates confuse DynamoDB on-demand capacity mode (option B) with a feature that handles spikes without manual intervention, but the question specifically asks for a 'feature' that adjusts provisioned capacity, and on-demand is a capacity mode that eliminates the need for provisioning altogether, not a feature that handles spikes within a provisioned model.
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
✓
DynamoDB auto scaling
DynamoDB auto scaling (option C) is the correct choice because it automatically adjusts the provisioned read and write capacity based on actual traffic patterns using the AWS Application Auto Scaling service. This allows the application to handle sudden spikes in traffic without manual intervention by increasing capacity when utilization rises and decreasing it when traffic subsides, all while maintaining a target utilization percentage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DynamoDB Accelerator (DAX)
Why it's wrong here
DAX is a caching service, not for handling capacity spikes.
- ✗
DynamoDB on-demand capacity mode
Why it's wrong here
On-demand mode handles spikes but is not a scaling feature; it's a billing mode.
- ✓
DynamoDB auto scaling
Why this is correct
Auto scaling adjusts read/write capacity automatically based on traffic.
- ✗
DynamoDB global tables
Why it's wrong here
Global tables are for multi-Region replication, not for handling spikes.
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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.