The correct approach is to create a new platform version using the `aws elasticbeanstalk create-platform-version` command with an updated platform definition file. This is necessary because custom platforms in Elastic Beanstalk are immutable—you cannot modify an existing platform version; instead, you must package a new platform definition file (a .zip containing the AMI ID and configuration) and use that command to generate a new version. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of the custom platform lifecycle and the distinction between platform updates and application version updates. A common trap is assuming you can patch an existing platform directly or that Elastic Beanstalk will automatically rebuild it, but the service requires explicit version creation. Memory tip: think "create, never mutate"—for custom platforms, you always create a new version rather than updating an existing one.
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 uses AWS Elastic Beanstalk with a custom platform. They need to update the platform version to include a new security patch. Which approach should be used to create a new custom platform version?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a new platform version using the aws elasticbeanstalk create-platform-version command with an updated platform definition file.
Option D is correct. Custom platforms are created by packaging a platform definition file (a .zip) and using the aws elasticbeanstalk create-platform-version command. The platform definition includes the AMI ID and other configuration. Option A is incorrect because you cannot update an existing platform; you must create a new version. Option B is incorrect because you cannot directly modify the AMI in the existing platform. Option C is incorrect because Beanstalk does not automatically rebuild platforms; you need to create a new version.
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.
✗
Use the Elastic Beanstalk CLI to rebuild the platform with the new AMI.
Why it's wrong here
The CLI does not rebuild platforms.
✗
Launch a new EC2 instance, apply the patch, and create an AMI, then update the platform version.
Why it's wrong here
You cannot update a platform version; you must create a new one.
✗
Modify the existing platform version's AMI ID using the Elastic Beanstalk console.
Why it's wrong here
Platform versions are immutable; you cannot modify them.
✓
Create a new platform version using the aws elasticbeanstalk create-platform-version command with an updated platform definition file.
Why this is correct
This creates a new custom platform version with the updated configuration.
Related concept
Static NAT maps one inside address to one outside address.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 DOP-C02 NAT questions on configuration and troubleshooting.
Configuration Management and IaC — This question tests Configuration Management and IaC — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a new platform version using the aws elasticbeanstalk create-platform-version command with an updated platform definition file. — Option D is correct. Custom platforms are created by packaging a platform definition file (a .zip) and using the aws elasticbeanstalk create-platform-version command. The platform definition includes the AMI ID and other configuration. Option A is incorrect because you cannot update an existing platform; you must create a new version. Option B is incorrect because you cannot directly modify the AMI in the existing platform. Option C is incorrect because Beanstalk does not automatically rebuild platforms; you need to create a new version.
What should I do if I get this DOP-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 DOP-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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