EX294 Manage inventories and credentials Practice Question
This EX294 practice question tests your understanding of manage inventories and credentials. 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.
An Ansible inventory file uses the `gce.py` dynamic inventory script for Google Cloud. After running the script, the inventory contains hosts but no variables. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The script's JSON output lacks the 'vars' section for the group.
Option C is correct because dynamic inventory scripts like `gce.py` output JSON that must include a `_meta` section with `hostvars` for host-specific variables, and a `vars` subsection within each group to define group-level variables. If the script's JSON output lacks the `vars` section for a group, Ansible will still see the hosts but will not populate any variables for that group, resulting in hosts with no associated variables.
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.
✗
The script is not executable.
Why it's wrong here
Would prevent the script from running at all.
✗
The GCE service account lacks permissions to read instance metadata.
Why it's wrong here
Would cause the script to fail, not just missing variables.
✓
The script's JSON output lacks the 'vars' section for the group.
Why this is correct
Variables are only populated if the script includes a 'vars' key in each group.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The inventory file uses `hosts: all`.
Why it's wrong here
This is not a valid syntax for dynamic inventory scripts.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume missing variables are due to permission or execution issues, but the question specifically states the script runs and produces hosts, narrowing the cause to a structural problem in the script's JSON output.
Detailed technical explanation
How to think about this question
Dynamic inventory scripts must conform to the Ansible inventory script contract, which expects a JSON structure with a `_meta` key containing `hostvars` and optional group-level `vars` keys. The `gce.py` script, when run, queries the GCE API and constructs this JSON; if the script omits the `vars` section for a group (e.g., due to a bug or misconfiguration), Ansible will still add the hosts to the group but will not assign any group variables. This is a common issue when customizing or extending dynamic inventory scripts without adhering to the expected schema.
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.
TExam Day Tips
→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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Manage inventories and credentials — This question tests Manage inventories and credentials — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The script's JSON output lacks the 'vars' section for the group. — Option C is correct because dynamic inventory scripts like `gce.py` output JSON that must include a `_meta` section with `hostvars` for host-specific variables, and a `vars` subsection within each group to define group-level variables. If the script's JSON output lacks the `vars` section for a group, Ansible will still see the hosts but will not populate any variables for that group, resulting in hosts with no associated variables.
What should I do if I get this EX294 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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