DEA-C01 Data Store Management Practice Question
Which TWO features of Amazon DynamoDB help ensure high availability and durability? (Choose two.)
⚠ Common exam trap
Watch out — candidates often confuse auto-scaling (Option A) with high availability, but auto-scaling only adjusts capacity to meet demand, not data replication or fault tolerance.
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
✓
Data is automatically replicated across multiple Availability Zones within an AWS Region.
DynamoDB automatically replicates data synchronously across three Availability Zones (AZs) within an AWS Region. This built-in replication ensures that even if an entire AZ fails, the data remains available and durable, providing a 99.999999999% (11 nines) durability SLA.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Auto-scaling adjusts provisioned capacity based on traffic.
Why it's wrong here
Auto-scaling is for performance, not durability.
- ✓
Data is automatically replicated across multiple Availability Zones within an AWS Region.
Why this is correct
Provides high availability and durability.
- ✗
Global tables enable active-active replication across multiple AWS Regions.
Why it's wrong here
Global tables are for multi-Region, not within a Region.
- ✓
On-demand backup and restore provides point-in-time recovery.
Why this is correct
Enables recovery from accidental writes or deletions.
- ✗
Time to Live (TTL) automatically deletes expired items.
Why it's wrong here
TTL is for data lifecycle, not availability.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-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 DEA-C01 exam.