This PAS-C01 practice question tests your understanding of operations and maintenance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
PermittedThroughput
Why wrong: This is not a standard CloudWatch metric for EFS.
BurstCreditBalance
This metric shows the number of burst credits remaining.
Throughput
Why wrong: Throughput shows actual data transfer, not credit balance.
PercentIOLimit
Why wrong: This is not a valid CloudWatch metric for EFS.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
BurstCreditBalance
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.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
PermittedThroughput
Why it's wrong here
This is not a standard CloudWatch metric for EFS.
BurstCreditBalance
Why this is correct
This metric shows the number of burst credits remaining.
Related concept
Standard ACLs match source addresses.
Throughput
Why it's wrong here
Throughput shows actual data transfer, not credit balance.
PercentIOLimit
Why it's wrong here
This is not a valid CloudWatch metric for EFS.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Trap categories for this question
Command / output trap
Throughput shows actual data transfer, not credit balance.
Detailed technical explanation
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
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FAQ
Operations and Maintenance — This question tests Operations and Maintenance — Standard ACLs match source addresses..
The correct answer is: BurstCreditBalance — 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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
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.
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