Question 406 of 528

Manage task execution and roles →easyMultiple ChoiceObjective-mapped

Enforcing Task Execution Order Using Role Dependencies in Ansible

This EX294 practice question tests your understanding of manage task execution and roles. 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.

A team is automating server configuration using Ansible. They have a custom role 'security' that updates firewall and SSH settings. They notice that when they apply the role to multiple hosts, the SSH configuration changes sometimes fail because the firewall blocks the SSH port before the SSH configuration is updated. They need to ensure that SSH configuration is updated first, then firewall rules are applied. They have defined both tasks in the same role. What should they do?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

A
Use tags to control the sequence of tasks.
Why wrong: Incorrect: tags only allow selective execution, not ordering.
B
Split the role into two separate roles and use role dependencies to enforce order.
Correct: role dependencies in meta/main.yml enforce execution order.
C
Use pre_tasks for SSH and post_tasks for firewall in the playbook.
Why wrong: Incorrect: pre_tasks and post_tasks apply before and after all roles, not within a role.
D
Use the 'order' directive in the playbook to specify task order within the role.
Why wrong: Incorrect: there is no 'order' directive for role tasks.

Full breakdown with real-world context →

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

✓

Split the role into two separate roles and use role dependencies to enforce order.

Role dependencies allow you to define that one role must be executed before another. By splitting the 'security' role into separate roles for SSH and firewall, and setting the firewall role to depend on the SSH role, Ansible will always execute the SSH role first, ensuring the SSH configuration is updated before firewall rules are applied. This enforces order at the role level, which is the correct approach when tasks within a single role cannot be reordered independently.

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.

✗
Use tags to control the sequence of tasks.
Why it's wrong here
Incorrect: tags only allow selective execution, not ordering.
✓
Split the role into two separate roles and use role dependencies to enforce order.
Why this is correct
Correct: role dependencies in meta/main.yml enforce execution order.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use pre_tasks for SSH and post_tasks for firewall in the playbook.
Why it's wrong here
Incorrect: pre_tasks and post_tasks apply before and after all roles, not within a role.
✗
Use the 'order' directive in the playbook to specify task order within the role.
Why it's wrong here
Incorrect: there is no 'order' directive for role tasks.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often think tags or pre/post_tasks can reorder tasks within a role, but tags only filter tasks and pre/post_tasks operate at the play level, not within a role's internal task list.

Detailed technical explanation

How to think about this question

Role dependencies are defined in the meta/main.yml file of a role using the 'dependencies' keyword, which accepts a list of roles. When a role has dependencies, Ansible resolves them recursively and executes the dependent roles first, ensuring a strict execution order. This is particularly useful in scenarios like firewall and SSH configuration where the order of operations is critical to avoid locking out administrators. Under the hood, Ansible's dependency resolver uses a depth-first traversal to flatten the role execution list before the playbook 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.

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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: Split the role into two separate roles and use role dependencies to enforce order. — Role dependencies allow you to define that one role must be executed before another. By splitting the 'security' role into separate roles for SSH and firewall, and setting the firewall role to depend on the SSH role, Ansible will always execute the SSH role first, ensuring the SSH configuration is updated before firewall rules are applied. This enforces order at the role level, which is the correct approach when tasks within a single role cannot be reordered independently.

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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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