PAS-C01 Technology Practice Question
An SAP system on AWS is experiencing slow performance for batch jobs. The jobs are I/O intensive and write large amounts of data to EBS volumes. CloudWatch metrics show that the EBS volumes are reaching their throughput limits. Which action will MOST effectively improve performance?
⚠ Common exam trap
It's easy for candidates to confuse throughput limits with IOPS limits or assume that adding read replicas (Option A) or Multi-AZ (Option C) can improve write performance, when in fact they only address read scaling or availability, not the underlying EBS throughput bottleneck.
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
✓
Increase the size of the EBS volumes to improve baseline throughput.
Increasing the size of EBS volumes directly improves their baseline throughput performance because EBS throughput scales with volume size. For gp2 volumes, baseline throughput is 128 MiB/s for volumes up to 170 GiB, then increases by 0.5 MiB/s per GiB beyond that; for gp3, baseline throughput is 125 MiB/s regardless of size, but you can provision additional throughput. Since the batch jobs are I/O-intensive and hitting throughput limits, larger volumes provide higher throughput without requiring architectural changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add read replicas to offload read traffic.
Why it's wrong here
Does not improve write throughput.
- ✓
Increase the size of the EBS volumes to improve baseline throughput.
Why this is correct
Larger gp2/gp3 volumes have higher throughput.
- ✗
Use Multi-AZ for the database.
Why it's wrong here
HA feature, not performance.
- ✗
Move the data to instance store volumes.
Why it's wrong here
Ephemeral, data loss risk.
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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.