EX294 Transform data with filters and plugins Practice Question
This EX294 practice question tests your understanding of transform data with filters and plugins. 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.
You are managing a fleet of 200 RHEL 8 servers with Ansible Tower. A playbook uses the 'seboolean' module to enable httpd_can_network_connect for a web application. Recently, the playbook has been failing on 10 servers with the error: 'Failed to set SELinux boolean: Unable to communicate with SELinux policy'. Other servers succeed. The playbook runs as the 'ansible' user with passwordless sudo. The failing servers have identical SELinux configuration (enforcing mode, targeted policy) and the same package versions as working servers. You suspect the issue is related to the 'python3-libselinux' package. Which of the following is the most likely cause and the correct fix?
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 'python3-libselinux' package is missing on the failing servers. Install it with 'dnf install python3-libselinux'.
The error 'Failed to set SELinux boolean: Unable to communicate with SELinux policy' indicates that the Python bindings required to interact with the SELinux policy are missing. The 'seboolean' module in Ansible relies on the 'python3-libselinux' package to communicate with the SELinux subsystem. Since the playbook runs as the 'ansible' user with passwordless sudo, and the failing servers have identical SELinux configuration and package versions except for this missing dependency, installing 'python3-libselinux' resolves the issue.
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 'python3-libselinux' package is missing on the failing servers. Install it with 'dnf install python3-libselinux'.
Why this is correct
Correct: The module requires the Python binding for libselinux.
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 'python2-libselinux' package is required because Ansible uses Python 2. Install it with 'dnf install python2-libselinux'.
Why it's wrong here
Incorrect: RHEL 8 uses Python 3 by default.
✗
The 'ansible' user lacks sudo access to the 'seboolean' command. Add a sudoers entry to allow it.
Why it's wrong here
Incorrect: The error is about SELinux communication, not sudo.
✗
The 'libsemanage' package is missing. Install it with 'dnf install libsemanage'.
Why it's wrong here
Incorrect: 'libsemanage' is not needed for the 'seboolean' module.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the missing Python binding with a missing system library or a permission issue, but the specific error message points directly to the Python-SELinux communication layer, which is provided by 'python3-libselinux'.
Detailed technical explanation
How to think about this question
The 'seboolean' module in Ansible uses the 'selinux' Python module (provided by 'python3-libselinux') to call functions like 'selinux.security_get_boolean_active()' and 'selinux.security_set_boolean()'. These functions rely on the libselinux library to communicate with the SELinux kernel subsystem via netlink sockets. Without the Python bindings, the module cannot issue the necessary system calls, resulting in the 'Unable to communicate with SELinux policy' error. In a real-world scenario, this often occurs when a minimal base image or a custom build omits the 'python3-libselinux' package, even though the core SELinux packages are present.
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.
Transform data with filters and plugins — This question tests Transform data with filters and plugins — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The 'python3-libselinux' package is missing on the failing servers. Install it with 'dnf install python3-libselinux'. — The error 'Failed to set SELinux boolean: Unable to communicate with SELinux policy' indicates that the Python bindings required to interact with the SELinux policy are missing. The 'seboolean' module in Ansible relies on the 'python3-libselinux' package to communicate with the SELinux subsystem. Since the playbook runs as the 'ansible' user with passwordless sudo, and the failing servers have identical SELinux configuration and package versions except for this missing dependency, installing 'python3-libselinux' resolves the issue.
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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