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 on AWS is experiencing increased latency in database queries. The operations team suspects that the RDS for Oracle instance is hitting its maximum connections limit. Which CloudWatch metric should be monitored to confirm this?
CPUCreditBalance
Why wrong: CPUCreditBalance indicates CPU credit usage for burstable instances, not connection limits.
DatabaseConnections
DatabaseConnections shows the number of connections; if it reaches the limit, new queries are queued.
SwapUsage
Why wrong: SwapUsage indicates memory pressure, not connection limits.
ReadIOPS
Why wrong: ReadIOPS measures I/O operations, not connections.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
DatabaseConnections
The DatabaseConnections metric in Amazon CloudWatch tracks the number of database sessions currently connected to the RDS for Oracle instance. When this metric approaches or reaches the value of the `max_connections` parameter (or the Oracle-specific `sessions` and `processes` limits), new connections are rejected, causing application-side latency as queries queue or fail. Monitoring this metric directly confirms whether the maximum connections limit is being hit.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
CPUCreditBalance
Why it's wrong here
CPUCreditBalance indicates CPU credit usage for burstable instances, not connection limits.
DatabaseConnections
Why this is correct
DatabaseConnections shows the number of connections; if it reaches the limit, new queries are queued.
Related concept
Read the scenario before looking for a memorised answer.
SwapUsage
Why it's wrong here
SwapUsage indicates memory pressure, not connection limits.
ReadIOPS
Why it's wrong here
ReadIOPS measures I/O operations, not connections.
Common exam traps
The trap here is that candidates often confuse performance metrics like IOPS or CPU with connection limits, assuming high latency must be caused by resource contention rather than a hard connection cap, which is a distinct and common RDS scaling issue.
Detailed technical explanation
In Oracle RDS, the `DatabaseConnections` metric corresponds to the number of sessions currently established, which is governed by the `sessions` and `processes` initialization parameters. When the session count reaches the `sessions` limit, Oracle returns an ORA-00018 error ('maximum number of sessions exceeded'), causing immediate connection failures. The CloudWatch metric updates every minute, so a sudden spike to the limit value (e.g., 200 for a db.t3.medium instance default) confirms the bottleneck.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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
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FAQ
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
The correct answer is: DatabaseConnections — The DatabaseConnections metric in Amazon CloudWatch tracks the number of database sessions currently connected to the RDS for Oracle instance. When this metric approaches or reaches the value of the `max_connections` parameter (or the Oracle-specific `sessions` and `processes` limits), new connections are rejected, causing application-side latency as queries queue or fail. Monitoring this metric directly confirms whether the maximum connections limit is being hit.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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