The answer is to store dependencies in an S3 bucket with caching, use a VPC with a NAT gateway for consistent networking, and enable CodeBuild local caching. These three actions directly address the root cause of intermittent network timeouts by reducing reliance on external dependency downloads and ensuring stable outbound connectivity, whereas simply increasing the build timeout or scaling up the instance type only masks the underlying network instability. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your ability to design resilient build pipelines that handle transient network failures, a common trap being that candidates confuse timeout adjustments with true reliability fixes. Remember the mnemonic “Cache, Connect, Contain”—cache dependencies locally, connect through a controlled VPC, and contain failures by avoiding external fetch dependencies at build time.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is using AWS CodePipeline to automate deployments. The pipeline includes a build stage that compiles code and runs tests. The build stage fails intermittently due to network timeouts when downloading dependencies. Which THREE actions could improve the reliability of the build stage?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use CodeBuild local cache to store dependencies across builds.
Options A, B, and D are correct: Caching dependencies, using a VPC with NATgateway for consistent networking, and using CodeBuild local caching reduce failures. Option C is wrong because increasing timeout only delays failure. Option E is wrong because using a larger instance type may not fix network timeouts.
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.
✗
Increase the build timeout to allow more time for downloads.
Why it's wrong here
Does not fix the root cause of timeout.
✓
Use CodeBuild local cache to store dependencies across builds.
Why this is correct
Local cache reduces download frequency.
Related concept
Static NAT maps one inside address to one outside address.
✓
Run the CodeBuild project in a VPC with a NAT gateway to ensure consistent outbound connectivity.
Static NAT maps one inside address to one outside address.
✓
Store dependencies in an S3 bucket and configure the build to use cached dependencies.
Why this is correct
Caching reduces dependency on external sources.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use a larger compute type for CodeBuild to improve network speed.
Why it's wrong here
Larger instance does not guarantee network reliability.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Use CodeBuild local cache to store dependencies across builds. — Options A, B, and D are correct: Caching dependencies, using a VPC with NAT gateway for consistent networking, and using CodeBuild local caching reduce failures. Option C is wrong because increasing timeout only delays failure. Option E is wrong because using a larger instance type may not fix network timeouts.
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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