Quick Answer
The correct answer is that the --query parameter filters the output to show only specified fields. This works because the parameter uses JMESPath, a JSON query language, to parse the raw JSON response from the AWS CLI and extract only the data you request, such as specific instance IDs or tags, without altering the underlying API call. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this concept tests your ability to efficiently manage output from commands like describe-instances, where you often need to isolate key details from large result sets. A common trap is confusing --query with the --filter parameter: --filter narrows results at the API level before the response is returned, while --query only formats the already-received output. Remember, --query is a client-side formatting tool, not a server-side filter. For a quick memory tip, think “Query after the call, filter before the call.”
This SOA-C02 practice question tests your understanding of security and compliance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Refer to the exhibit. A SysOps administrator runs the command to list running EC2 instances. What is the purpose of the '--query' parameter?
It filters the results on the server side.
Why wrong: Server-side filtering uses --filters.
It limits the API call to only running instances.
Why wrong: The API call retrieves all instances; query filters client-side.
It filters the output to show only specified fields.
JMESPath query selects specific fields.
It saves the output to a file.
Why wrong: Output redirection does that.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
It filters the output to show only specified fields.
Option D is correct because the '--query' parameter filters and formats the output using JMESPath. Option A is wrong because it does not filter before API call. Option B is wrong because it only formats output, not saves to a file. Option C is wrong because it does not change the API call.
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
For each option: why learners choose it and why it is or isn't the right answer here.
It filters the results on the server side.
Why it's wrong here
Server-side filtering uses --filters.
It limits the API call to only running instances.
Why it's wrong here
The API call retrieves all instances; query filters client-side.
It filters the output to show only specified fields.
Why this is correct
JMESPath query selects specific fields.
Related concept
Static NAT maps one inside address to one outside address.
It saves the output to a file.
Why it's wrong here
Output redirection does that.
Common exam traps
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.
Trap categories for this question
Command / output trap
Output redirection does that.
Detailed technical explanation
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.
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
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
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 SOA-C02 NAT questions on configuration and troubleshooting.
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FAQ
Security and Compliance — This question tests Security and Compliance — Static NAT maps one inside address to one outside address..
The correct answer is: It filters the output to show only specified fields. — Option D is correct because the '--query' parameter filters and formats the output using JMESPath. Option A is wrong because it does not filter before API call. Option B is wrong because it only formats output, not saves to a file. Option C is wrong because it does not change the API call.
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 SOA-C02 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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