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PAS-C01 Technology Practice Question

This PAS-C01 practice question tests your understanding of technology. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 sends large amounts of batch data via RFC calls between two EC2 instances in the same VPC. The application team reports high network latency. Which configuration change would most effectively reduce latency?

A
Assign Elastic IP addresses to both instances.
Why wrong: Elastic IPs do not reduce latency within the VPC.
B
Enable Elastic Network Adapter (ENA) on both instances.
Why wrong: ENA is already a best practice; it may not be the root cause.
C
Place both EC2 instances in the same cluster placement group.
Cluster placement groups provide low-latency, high-throughput networking between instances.
D
Use Elastic Fabric Adapter (EFA) for network communication.
Why wrong: EFA is for tightly coupled HPC workloads, not typical SAP.

Full breakdown with real-world context →

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

✓

Place both EC2 instances in the same cluster placement group.

Cluster placement groups provide low-latency, high-throughput network connectivity by placing instances in a single Availability Zone within a logical group, ensuring they are in close physical proximity. For SAP RFC batch data transfer between two EC2 instances in the same VPC, this reduces network hops and latency significantly compared to instances placed in different racks or AZs.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Assign Elastic IP addresses to both instances.
Why it's wrong here
Elastic IPs do not reduce latency within the VPC.
✗
Enable Elastic Network Adapter (ENA) on both instances.
Why it's wrong here
ENA is already a best practice; it may not be the root cause.
✓
Place both EC2 instances in the same cluster placement group.
Why this is correct
Cluster placement groups provide low-latency, high-throughput networking between instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Elastic Fabric Adapter (EFA) for network communication.
Why it's wrong here
EFA is for tightly coupled HPC workloads, not typical SAP.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse high-throughput features (ENA, EFA) with low-latency features, or assume Elastic IPs reduce network distance, when the key is physical proximity via a cluster placement group.

Detailed technical explanation

How to think about this question

Cluster placement groups use a low-latency, 10 Gbps or 25 Gbps network path between instances, leveraging the AWS backplane without traversing intermediate switches. Under the hood, they enforce co-location at the rack level, reducing round-trip times to under 1 ms for inter-instance communication. In real-world SAP deployments, this is critical for batch jobs that send thousands of RFC calls per second, where even a 1 ms reduction per call can cut total job time by minutes.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this PAS-C01 question test?

Technology — This question tests Technology — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Place both EC2 instances in the same cluster placement group. — Cluster placement groups provide low-latency, high-throughput network connectivity by placing instances in a single Availability Zone within a logical group, ensuring they are in close physical proximity. For SAP RFC batch data transfer between two EC2 instances in the same VPC, this reduces network hops and latency significantly compared to instances placed in different racks or AZs.

What should I do if I get this PAS-C01 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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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.