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 systems administrator needs to run a playbook that installs packages on a group of managed nodes. The playbook should run only on nodes that are part of the 'web_servers' group in the inventory. Which approach is best practice?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set 'hosts: web_servers' in the play.
Option A is correct because setting 'hosts: web_servers' in the play directly targets only the nodes in that inventory group, which is the simplest and most maintainable approach. This follows Ansible's best practice of declaring the target group explicitly in the playbook rather than relying on runtime flags or conditional logic, ensuring the playbook's intent is clear and portable.
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 'hosts: web_servers' in the play.
Why this is correct
Directly targeting the group is the simplest and most readable approach.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set 'hosts: all' and use '--limit web_servers' when running ansible-playbook.
Why it's wrong here
This requires remembering the limit flag each run; not idempotent in playbook definition.
✗
Set 'hosts: localhost' and delegate tasks to web_servers.
Why it's wrong here
localhost is the control node, not the managed nodes; delegation complicates the setup.
✗
Set 'hosts: all' and use a 'when' condition to check if the node is in the web_servers group.
Why it's wrong here
Using 'hosts: all' runs on all nodes, requiring extra conditional logic that can be avoided.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overcomplicate the solution by choosing runtime flags or conditional logic, forgetting that Ansible's simplest and most explicit targeting method—setting 'hosts' to the group name—is both best practice and the most reliable for clarity and execution.
Detailed technical explanation
How to think about this question
Under the hood, Ansible's inventory groups are resolved during playbook parsing; setting 'hosts: web_servers' directly populates the play's host pattern, which Ansible expands into a list of hosts from the inventory file (INI, YAML, or dynamic inventory). This approach avoids the overhead of evaluating 'when' conditions on every host and ensures that connection setup (e.g., SSH handshake) only occurs for intended nodes, which is critical in large environments with hundreds of hosts. A real-world scenario is a CI/CD pipeline where the playbook must be reusable across environments—hardcoding the group in the play ensures consistent behavior without relying on external flags.
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.
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: Set 'hosts: web_servers' in the play. — Option A is correct because setting 'hosts: web_servers' in the play directly targets only the nodes in that inventory group, which is the simplest and most maintainable approach. This follows Ansible's best practice of declaring the target group explicitly in the playbook rather than relying on runtime flags or conditional logic, ensuring the playbook's intent is clear and portable.
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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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