EX294 Implement advanced Ansible automation Practice Question
This EX294 practice question tests your understanding of implement advanced ansible automation. 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 system administrator wants to run a playbook on all hosts in the 'webservers' group, but only if the host is currently online. Which approach should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use 'wait_for_connection' as a pre-task to ensure connectivity.
Option D is correct because the `wait_for_connection` module is specifically designed to pause the playbook execution until a remote host becomes reachable over SSH or WinRM. By placing it as a pre-task, the playbook will only proceed to subsequent tasks for hosts that are currently online, effectively filtering out offline hosts. This directly meets the requirement to run the playbook only on hosts in the 'webservers' group that are online.
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 'gather_facts: no' to skip fact collection.
Why it's wrong here
Skipping facts does not test connectivity.
✗
Use 'throttle: 1' to limit concurrent connections.
Why it's wrong here
Throttle limits the number of forks, not connectivity.
✗
Set 'serial: 1' to run on one host at a time.
Why it's wrong here
Serial controls parallelism, not connectivity.
✓
Use 'wait_for_connection' as a pre-task to ensure connectivity.
Why this is correct
wait_for_connection waits for the host to become reachable.
Related concept
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 confuse connectivity testing with execution control keywords like `serial` or `throttle`, mistakenly believing those options can prevent a playbook from running on offline hosts, when in fact they only manage concurrency or order of execution without verifying reachability.
Detailed technical explanation
How to think about this question
The `wait_for_connection` module works by repeatedly attempting to establish a transport-level connection (SSH on port 22 by default) using the same connection plugin as the rest of the playbook, with configurable timeout and sleep intervals. Under the hood, it leverages the `ansible_connection` variable and can be tuned with parameters like `delay`, `timeout`, and `sleep` to handle network latency or slow booting hosts. In real-world scenarios, this is critical for rolling updates where hosts may reboot and come back at different times, ensuring the playbook does not fail on temporarily unreachable nodes.
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.
Implement advanced Ansible automation — This question tests Implement advanced Ansible automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use 'wait_for_connection' as a pre-task to ensure connectivity. — Option D is correct because the `wait_for_connection` module is specifically designed to pause the playbook execution until a remote host becomes reachable over SSH or WinRM. By placing it as a pre-task, the playbook will only proceed to subsequent tasks for hosts that are currently online, effectively filtering out offline hosts. This directly meets the requirement to run the playbook only on hosts in the 'webservers' group that are online.
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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