The answer is to configure a predictive scaling policy using AWS Auto Scaling. This is the correct choice because predictive scaling uses machine learning to analyze historical traffic patterns and proactively provision the right number of EC2 instances before CPU utilization spikes, rather than reacting after the load has already reached 90%. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your understanding of how Elastic Beanstalk integrates with AWS Auto Scaling to move from reactive to proactive scaling, a key distinction for handling sudden surges without lag. A common trap is choosing scheduled scaling, which only works for fixed, predictable events, or simple scaling, which reacts too slowly. Remember the memory tip: “Predictive prevents panic” — it forecasts the future load so your environment is ready before the surge hits, unlike reactive policies that chase the metric.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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.
A company runs a stateless web application on AWS Elastic Beanstalk. The application experiences periodic spikes in traffic that cause CPU utilization to reach 90% on the EC2 instances. The company wants to automatically scale the environment based on CPU usage. They also want to ensure that the scaling is proactive and can handle sudden traffic surges. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a predictive scaling policy using AWS Auto Scaling.
Option D is correct. Using a predictive scaling policy with Elastic Beanstalk allows proactive scaling based on historical patterns. Option A: Simple scaling policies react to alarms but may lag. Option B: Scheduled scaling is for predictable patterns, not sudden surges. Option C: Manual scaling is not automated.
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.
✗
Configure a simple scaling policy based on CPU utilization with a cooldown period.
Why it's wrong here
Simple scaling reacts after the alarm triggers, which may be too slow for sudden surges.
✓
Configure a predictive scaling policy using AWS Auto Scaling.
Why this is correct
Predictive scaling uses historical data to forecast and proactively add capacity before spikes.
Related concept
Static NAT maps one inside address to one outside address.
✗
Manually increase the instance count when traffic spikes are expected.
Why it's wrong here
Manual scaling is not automated and may not react quickly enough.
✗
Use scheduled scaling to add instances during known peak times.
Why it's wrong here
Scheduled scaling is for predictable patterns, not for unexpected spikes.
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
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.
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: Configure a predictive scaling policy using AWS Auto Scaling. — Option D is correct. Using a predictive scaling policy with Elastic Beanstalk allows proactive scaling based on historical patterns. Option A: Simple scaling policies react to alarms but may lag. Option B: Scheduled scaling is for predictable patterns, not sudden surges. Option C: Manual scaling is not automated.
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.
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Question Discussion
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