DBS-C01 Monitoring and Troubleshooting Practice Question
A company uses Amazon ElastiCache for Redis. They want to monitor cache hit ratio. Which TWO metrics should be used to calculate the cache hit ratio?
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
✓
CacheHits
Cache hit ratio is calculated as CacheHits / (CacheHits + CacheMisses). Therefore, the two metrics needed are CacheHits (option B) and CacheMisses (option D). Options A, C, and E are not used in this calculation: GetTypeCmds counts total get commands, Evictions indicates memory pressure, and CurItems shows the number of items in the cache.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GetTypeCmds
Why it's wrong here
Total get commands, but hit ratio uses hits and misses.
- ✓
CacheHits
Why this is correct
Number of successful key lookups.
- ✗
Evictions
Why it's wrong here
Evictions is for memory management, not hit ratio.
- ✓
CacheMisses
Why this is correct
Number of key lookups that failed.
- ✗
CurItems
Why it's wrong here
Current number of items in cache, not used for hit ratio.
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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.