EX294 Transform data with filters and plugins Practice Question
This EX294 practice question tests your understanding of transform data with filters and plugins. 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.
Exhibit
Refer to the exhibit.
```
fatal: [localhost]: FAILED! => {"msg": "template error while templating string: no filter named 'encrypt_string'. Use `ansible-doc -t filter plugin` to find available filters."}
```
What is the most likely cause of this error?
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.
Refer to the exhibit.
```
fatal: [localhost]: FAILED! => {"msg": "template error while templating string: no filter named 'encrypt_string'. Use `ansible-doc -t filter plugin` to find available filters."}
```
A
The `filter_plugins` path is misconfigured.
Why wrong: Incorrect; this would cause a different error if custom filters were expected, but the default filters include many options; 'encrypt_string' is not standard.
B
The `encrypt_string` filter plugin is not installed.
Why wrong: Incorrect; the error says no filter named, implying either name is wrong or plugin missing. But the message suggests using `ansible-doc` to find available filters, indicating the filter might not exist at all.
C
The filter name is incorrect; no filter named 'encrypt_string' exists by default.
Correct; the error indicates the filter is not found, likely because the name is wrong (e.g., maybe 'password_hash' was intended).
D
The playbook syntax is invalid.
Why wrong: Incorrect; the error is about a missing filter, not syntax.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The filter name is incorrect; no filter named 'encrypt_string' exists by default.
The error occurs because there is no built-in filter named 'encrypt_string' in Ansible. While Ansible provides many filters for data transformation, 'encrypt_string' is not one of them by default. This filter would need to be provided by a custom filter plugin or a collection, and since it is not present, Ansible raises an undefined filter error.
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 `filter_plugins` path is misconfigured.
Why it's wrong here
Incorrect; this would cause a different error if custom filters were expected, but the default filters include many options; 'encrypt_string' is not standard.
✗
The `encrypt_string` filter plugin is not installed.
Why it's wrong here
Incorrect; the error says no filter named, implying either name is wrong or plugin missing. But the message suggests using `ansible-doc` to find available filters, indicating the filter might not exist at all.
✓
The filter name is incorrect; no filter named 'encrypt_string' exists by default.
Why this is correct
Correct; the error indicates the filter is not found, likely because the name is wrong (e.g., maybe 'password_hash' was intended).
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 playbook syntax is invalid.
Why it's wrong here
Incorrect; the error is about a missing filter, not syntax.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Red Hat often tests the distinction between built-in filters and custom plugins, leading candidates to assume a filter exists because it sounds plausible or because they confuse it with a similar feature like the `vault` module.
Detailed technical explanation
How to think about this question
Ansible filters are implemented as Python functions in Jinja2, and custom filters can be added via the `filter_plugins` directory or collections. The error 'template error while templating string: no filter named 'encrypt_string'' is raised by Jinja2's environment when a filter is not registered. In real-world scenarios, users might confuse this with the `password_hash` filter or the `vault` lookup plugin, which handle encryption differently.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 filter name is incorrect; no filter named 'encrypt_string' exists by default. — The error occurs because there is no built-in filter named 'encrypt_string' in Ansible. While Ansible provides many filters for data transformation, 'encrypt_string' is not one of them by default. This filter would need to be provided by a custom filter plugin or a collection, and since it is not present, Ansible raises an undefined filter error.
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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