The answer is to implement scheduled scaling actions to add capacity before known peak times. This is correct because scheduled scaling proactively adjusts the desired capacity of the Auto Scaling group based on predictable traffic patterns, such as daily business hours or marketing events, which directly addresses the need to improve Auto Scaling responsiveness for traffic spikes without waiting for dynamic thresholds to be breached. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of the difference between reactive and proactive scaling strategies; a common trap is to assume that simply lowering the CPU utilization threshold or switching to step scaling will solve latency during sudden spikes, but those are still reactive measures that suffer from the inherent lag of instance launch times. Remember the memory tip: “Predict the peak, schedule the fleet”—if you know the spike is coming, don’t wait for the alarm, use scheduled actions to pre-warm capacity.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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.
A company runs a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). They have configured an Auto Scaling group with a dynamic scaling policy based on CPU utilization. During a traffic spike, the Auto Scaling group launches new instances, but users report slow response times. What should the company do to improve the scaling responsiveness?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement scheduled scaling actions to add capacity before known peak times.
Option C is correct because scheduled scaling can pre-emptively add capacity based on known traffic patterns. Option A is wrong because increasing cooldown would delay scaling. Option B is wrong because step scaling is more aggressive but not proactive. Option D is wrong because lowering threshold would cause over-scaling and cost.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Decrease the CPU utilization threshold for scale-out.
Why it's wrong here
Lowering threshold would cause more frequent scaling but still reactive.
✗
Increase the cooldown period for the Auto Scaling group.
Why it's wrong here
Increasing cooldown delays scaling, making it slower to respond.
✓
Implement scheduled scaling actions to add capacity before known peak times.
Why this is correct
Scheduled scaling proactively adds capacity based on expected traffic.
Related concept
Static NAT maps one inside address to one outside address.
✗
Change the scaling policy to step scaling with a higher step adjustment.
Why it's wrong here
Step scaling is reactive, not proactive.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Implement scheduled scaling actions to add capacity before known peak times. — Option C is correct because scheduled scaling can pre-emptively add capacity based on known traffic patterns. Option A is wrong because increasing cooldown would delay scaling. Option B is wrong because step scaling is more aggressive but not proactive. Option D is wrong because lowering threshold would cause over-scaling and cost.
What should I do if I get this SAP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A development team deploys a web application on Amazon EC2 instances behind an Application Load Balancer. The application experiences intermittent 503 errors. A Solutions Architect notices that the errors coincide with high CPU utilization on the EC2 instances. What is the MOST effective way to improve the application's availability?
easy
A.Increase the idle timeout setting on the Application Load Balancer.
B.Decrease the health check interval on the Application Load Balancer.
✓ C.Configure an Auto Scaling group for the EC2 instances with a scaling policy based on average CPU utilization.
D.Use larger EC2 instance types to handle the load.
Why C: Option C is correct because adding an Auto Scaling group with a scaling policy based on CPU utilization dynamically adjusts capacity to handle load spikes, reducing 503 errors. Option A is wrong because larger instances may not be cost-effective and do not address dynamic scaling. Option B is wrong because increasing the ALB idle timeout does not affect CPU utilization. Option D is wrong because reducing the health check interval may cause premature instance replacement without fixing the root cause.
Last reviewed: Jun 20, 2026
Question Discussion
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This SAP-C02 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 SAP-C02 exam.
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