EX294 Implement advanced Ansible automation Practice Question
This EX294 practice question tests your understanding of implement advanced ansible automation. 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.
A company uses dynamic inventory from a cloud provider. The playbook needs to run tasks only on instances with a specific tag. The ansible_ec2_tags variable is not available. What is the most efficient method to filter hosts?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the amazon.aws.aws_ec2 inventory plugin with compose and keyed_groups.
Option C is correct because using the aws_ec2 inventory plugin with compose and keyed_groups allows pre-filtering hosts efficiently. Option A is inefficient as it runs a task on all hosts. Option B may not have the variable available. Option D requires manual maintenance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 hostvars lookup to check tags.
Why it's wrong here
hostvars may not contain the tag variable if not gathered.
✗
Use the ec2_instance_facts module inside the playbook to gather facts and filter.
Why it's wrong here
This runs on all hosts, wasting resources.
✗
Use a static inventory file with hosts pre-filtered.
Why it's wrong here
Defeats the purpose of dynamic inventory.
✓
Use the amazon.aws.aws_ec2 inventory plugin with compose and keyed_groups.
Why this is correct
Pre-filters hosts at inventory time, most efficient.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the EX294 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which EX294 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Implement advanced Ansible automation — This question tests Implement advanced Ansible automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the amazon.aws.aws_ec2 inventory plugin with compose and keyed_groups. — Option C is correct because using the aws_ec2 inventory plugin with compose and keyed_groups allows pre-filtering hosts efficiently. Option A is inefficient as it runs a task on all hosts. Option B may not have the variable available. Option D requires manual maintenance.
What should I do if I get this EX294 question wrong?
Identify which EX294 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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