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.
An Ansible playbook uses the "community.general" collection to manage firewall rules. The engineer wants to use a lookup plugin to fetch the current IPv4 address of a host to include in a dynamic inventory script. Which TWO of the following options correctly describe the usage of lookup plugins in Ansible?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Lookup plugins are executed on the control node and return data to the Ansible controller.
Option C is correct because lookup plugins in Ansible are designed to run on the control node (the machine where Ansible is executed), not on the remote host. They fetch data from external sources (e.g., files, databases, environment variables) and return that data to the Ansible controller for use in playbooks or inventory scripts. This aligns with the requirement to fetch the current IPv4 address of a host for a dynamic inventory script, as the lookup plugin can query local or network sources without needing to execute on the target host.
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.
✗
Lookup plugins are always executed on the remote host.
Why it's wrong here
Lookup plugins run on the control node.
✗
Lookup plugins must be imported using the "lookup" keyword.
Why it's wrong here
They are invoked via the lookup function, not imported.
✓
Lookup plugins are executed on the control node and return data to the Ansible controller.
Why this is correct
Correct; they fetch data on the control node.
Related concept
Read the scenario before looking for a memorised answer.
✗
The "file" lookup plugin reads the content of a file from the remote host.
Why it's wrong here
The file lookup reads from the control node.
✓
Lookup plugins can be used in "vars" sections of a playbook.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse lookup plugins (control node execution) with modules (remote host execution), or mistakenly think the 'lookup' keyword is a special Ansible keyword rather than a Jinja2 function, leading them to select options A or B.
Detailed technical explanation
How to think about this question
Under the hood, lookup plugins are implemented as Python modules in the 'ansible.plugins.lookup' namespace and are executed on the control node during playbook parsing or variable evaluation. They are often used in 'vars' sections or directly in Jinja2 templates to inject dynamic data, such as reading a local CSV file for inventory or querying an external API for IP addresses. A subtle behavior is that lookup plugins are evaluated at the time the variable is used, not at playbook load time, which can affect idempotency if the external data source changes between runs.
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: Lookup plugins are executed on the control node and return data to the Ansible controller. — Option C is correct because lookup plugins in Ansible are designed to run on the control node (the machine where Ansible is executed), not on the remote host. They fetch data from external sources (e.g., files, databases, environment variables) and return that data to the Ansible controller for use in playbooks or inventory scripts. This aligns with the requirement to fetch the current IPv4 address of a host for a dynamic inventory script, as the lookup plugin can query local or network sources without needing to execute on the target host.
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.
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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