- A
Set the variable in the inventory host_vars.
Why wrong: Inventory host_vars affect all roles on that host, not specific to a role.
- B
Pass the variable as a parameter to the role in the playbook.
Role parameters take precedence over defaults and are specific to that role invocation.
- C
Set the variable in the role's vars/main.yml.
Why wrong: Role vars have higher priority than defaults but cannot be overridden per usage; they are part of the role definition.
- D
Set the variable in the playbook's vars section.
Why wrong: Playbook vars apply to all roles in the play, not just one.
Question 525 of 528
EX294 Manage task execution and roles Practice Question
This EX294 practice question tests your understanding of manage task execution and roles. 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 playbook uses roles with default variables. The administrator needs to override a default variable for a specific role only when that role is used. Which method should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pass the variable as a parameter to the role in the playbook.
When you need to override a default variable for a specific role only when that role is used, the correct method is to pass the variable as a parameter to the role in the playbook using the `vars` keyword within the role declaration. This ensures the override applies exclusively to that role invocation, without affecting other roles or the global playbook scope.
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.
- ✗
Set the variable in the inventory host_vars.
Why it's wrong here
Inventory host_vars affect all roles on that host, not specific to a role.
- ✓
Pass the variable as a parameter to the role in the playbook.
Why this is correct
Role parameters take precedence over defaults and are specific to that role invocation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set the variable in the role's vars/main.yml.
Why it's wrong here
Role vars have higher priority than defaults but cannot be overridden per usage; they are part of the role definition.
- ✗
Set the variable in the playbook's vars section.
Why it's wrong here
Playbook vars apply to all roles in the play, not just one.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the scope of playbook-level `vars` with role-specific parameter passing, assuming any variable set in the playbook's `vars` section will only affect the role, when in fact it applies to all tasks in the play.
Detailed technical explanation
How to think about this question
When you pass a variable as a parameter to a role in a playbook, Ansible merges that variable with the role's defaults at runtime, with the passed parameter taking precedence due to Ansible's variable precedence hierarchy (role parameters rank higher than role defaults). This is particularly useful in scenarios like deploying a web server role where you need to override the default `http_port` for a specific environment without altering the role's reusable code.
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.
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Manage task execution and roles — study guide chapter
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FAQ
Questions learners often ask
What does this EX294 question test?
Manage task execution and roles — This question tests Manage task execution and roles — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Pass the variable as a parameter to the role in the playbook. — When you need to override a default variable for a specific role only when that role is used, the correct method is to pass the variable as a parameter to the role in the playbook using the `vars` keyword within the role declaration. This ensures the override applies exclusively to that role invocation, without affecting other roles or the global playbook scope.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 2026
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