PAS-C01 Operations and Maintenance Practice Question
An SAP administrator is troubleshooting a performance issue where the SAP application is slow. The administrator suspects that the EBS volumes are not meeting performance requirements. Which THREE metrics should be examined in Amazon CloudWatch to confirm this? (Choose THREE.)
⚠ Common exam trap
While BurstBalance is an EBS metric for volumes with burst capability (gp2, st1, sc1), it is not one of the three metrics that directly confirm a performance bottleneck. A low BurstBalance indicates that burst credits are depleted, but the primary indicators of a performance issue are I/O queue depth (VolumeQueueLength) and throughput (VolumeReadBytes/VolumeWriteBytes). Candidates may mistakenly think BurstBalance is a primary metric, but it is not among the top three for troubleshooting performance.
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
✓
VolumeQueueLength
Options A, B, and C are correct. VolumeQueueLength indicates the number of pending I/O requests, which can point to performance bottlenecks. VolumeReadBytes and VolumeWriteBytes measure the throughput of read and write operations, respectively. Option D (CPUCreditBalance) is related to CPU credits for burstable instances, not EBS performance. Option E (BurstBalance) tracks EBS burst credits but is not among the primary metrics to confirm EBS volume performance issues; the three chosen metrics directly address I/O queue depth and throughput.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
VolumeQueueLength
Why this is correct
Indicates pending I/O requests.
- ✓
VolumeReadBytes
Why this is correct
Measures read throughput.
- ✓
VolumeWriteBytes
Why this is correct
Measures write throughput.
- ✗
CPUCreditBalance
Why it's wrong here
CPUCreditBalance is for CPU credits, not EBS.
- ✗
BurstBalance
Why it's wrong here
BurstBalance is for T2/T3 instances, not EBS volumes.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-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 PAS-C01 exam.