PAS-C01 Technology Practice Question
An SAP application running on an EC2 instance is experiencing high latency during peak hours. The instance is in a private subnet with a NAT Gateway for outbound internet. Which action would most effectively reduce latency for SAP users?
⚠ Common exam trap
Test-takers frequently confuse network latency (which NAT Gateway or subnet changes might affect) with application latency caused by resource exhaustion, leading them to incorrectly choose network-related fixes instead of scaling the instance.
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 EC2 instance size to a larger type with more CPU and memory.
Increasing the EC2 instance size to a larger type with more CPU and memory directly addresses the root cause of high latency during peak hours for an SAP application: resource contention. SAP is compute and memory-intensive; when the instance's vCPUs and RAM are saturated, request queuing and processing delays occur. A larger instance type provides more dedicated resources, reducing processing time per transaction and thus lowering latency for users.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Increase the EC2 instance size to a larger type with more CPU and memory.
Why this is correct
Larger instance type directly improves compute performance, reducing application latency.
- ✗
Move the instance to a public subnet and assign a public IP address.
Why it's wrong here
Moving to public subnet does not inherently improve performance and introduces security risks.
- ✗
Replace the NAT Gateway with an Internet Gateway.
Why it's wrong here
Internet Gateway is for public subnets; private subnet still needs NAT for outbound. This does not reduce latency for inbound SAP traffic.
- ✗
Enable EBS optimization on the instance.
Why it's wrong here
EBS optimization improves disk throughput but not network latency for SAP application.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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