Question 680 of 1,711
DEA-C01 Data Store Management Practice Question
An e-commerce application uses Amazon ElastiCache for Redis to cache product catalog data. The cache currently uses lazy loading. The team wants to ensure that frequently accessed product data is always fresh. Which caching strategy should they implement?
⚠ Common exam trap
Candidates often assume lazy loading with a short TTL is sufficient for freshness, but the exam tests the understanding that only write-through (or write-behind) strategies guarantee synchronous cache updates without relying on expiration windows.
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
✓
Write-through caching
Write-through caching ensures that data is written to the cache simultaneously with the database, guaranteeing that frequently accessed product data is always fresh. This strategy eliminates stale reads by synchronously updating the cache on every write, which directly addresses the requirement for freshness without relying on expiration or lazy population.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Write-through caching
Why this is correct
Write-through updates cache directly on writes, ensuring data is always fresh.
- ✗
Set a TTL of 5 minutes for all cached items
Why it's wrong here
TTL does not guarantee freshness if data changes within the TTL window.
- ✗
Use database read replicas to serve data
Why it's wrong here
Read replicas are for database scaling, not caching.
- ✗
Lazy loading with TTL
Why it's wrong here
Lazy loading may serve stale data until TTL expires.
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Last reviewed: Jun 11, 2026
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.
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