PAS-C01 Operations and Maintenance Practice Question
An SAP system on AWS uses a shared file system via Amazon EFS mounted on multiple EC2 instances. Users report that file operations are slow. Which metric in Amazon CloudWatch should be analyzed to determine if the EFS file system's throughput is being throttled?
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
✓
BurstCreditBalance
(BurstCreditBalance) is correct because the BurstCreditBalance metric indicates the remaining burst credits for an EFS file system. When burst credits are exhausted, throughput is throttled. Option A (PercentIOLimit) is not a standard CloudWatch metric for EFS. Option C (DataReadIOBytes) measures the number of bytes read, not throttling. Option D (MeteredIOBytes) measures the metered I/O size, not directly related to throttling.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PercentIOLimit
Why it's wrong here
This is not a standard CloudWatch metric for EFS.
- ✓
BurstCreditBalance
Why this is correct
If BurstCreditBalance is low or zero, the file system is throttled.
- ✗
DataReadIOBytes
Why it's wrong here
This metric shows amount of data read, not throttle state.
- ✗
MeteredIOBytes
Why it's wrong here
This measures metered I/O, not throttling.
Go deeper
Related to this question
About these practice questions
Courseiva writes every PAS-C01 question from scratch — 1,616 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on PAS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An SAP system running on AWS uses a shared file system via Amazon EFS. Recently, the file system has become slow. The administrator suspects that the burst credits are exhausted. What metric should the administrator check in Amazon CloudWatch to confirm this?
hard- A.PermittedThroughput
- ✓ B.BurstCreditBalance
- C.Throughput
- D.PercentIOLimit
Why B: EFS has a BurstCreditBalance metric that tracks available burst credits. When exhausted, throughput drops. PercentIOLimit is not a valid metric. Throughput is the actual throughput, not credit balance. PermittedThroughput is not a metric.
JA
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.