The answer is that Ansible is idempotent, meaning running the same playbook multiple times produces the same state without unintended side effects. This is true because Ansible playbooks are written in YAML, a human-readable data serialization language that declaratively defines the desired end state of a system, rather than scripting the steps to get there. On the CompTIA Linux+ XK0-005 exam, this concept tests your understanding of configuration management principles, often appearing in questions that contrast Ansible with imperative scripting tools like Bash. A common trap is confusing idempotency with simplicity—idempotency ensures safety, not just ease of use. Remember the mnemonic: "YAML Declares, Idempotency Spares."
XK0-005 Scripting, Containers and Automation Practice Question
This XK0-005 practice question tests your understanding of scripting, containers and 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.
Which THREE statements about Ansible are true? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ansible playbooks are written in YAML
Ansible playbooks are written in YAML because YAML is a human-readable data serialization language that allows Ansible to define automation workflows declaratively. The control node parses the YAML playbook into Python data structures, which are then executed against managed nodes via modules. This design eliminates the need for a custom domain-specific language and simplifies version control and collaboration.
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.
✓
Ansible playbooks are written in YAML
Why this is correct
Playbooks are YAML files.
Related concept
Read the scenario before looking for a memorised answer.
✗
Ansible uses a centralized master server
Why it's wrong here
Ansible can be run from any control node and does not require a centralized server.
✗
Ansible requires Python on the control node only
Why it's wrong here
Python is required on both control and managed nodes.
✓
Ansible is idempotent
Why this is correct
Ansible ensures the system state matches the desired state.
Related concept
Read the scenario before looking for a memorised answer.
✗
Ansible requires an agent to be installed on managed nodes
Why it's wrong here
Ansible is agentless and uses SSH (or other transports).
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that Ansible requires a master server (like Puppet or Chef) or that it needs agents on managed nodes, but the trap here is that Ansible is agentless and uses a simple push model from a single control node.
Detailed technical explanation
How to think about this question
Ansible's idempotence is achieved by each module checking the current state of a resource before making changes; for example, the 'file' module uses stat() to verify file existence and attributes before creating or modifying it. This design ensures that running the same playbook multiple times produces the same result without unintended side effects, which is critical for configuration drift remediation in large-scale environments. The control node uses a local Python interpreter to parse YAML and invoke modules, while managed nodes only need Python 2.7 or 3.5+ to run the module payloads sent over the SSH connection.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this XK0-005 question in full detail.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ansible playbooks are written in YAML — Ansible playbooks are written in YAML because YAML is a human-readable data serialization language that allows Ansible to define automation workflows declaratively. The control node parses the YAML playbook into Python data structures, which are then executed against managed nodes via modules. This design eliminates the need for a custom domain-specific language and simplifies version control and collaboration.
What should I do if I get this XK0-005 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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