Ansible Automation Ansible Playbooks 4

Question 1

Which Jinja2 filter would you use to convert a list into a comma-separated string inside a playbook template?

Accepted Answer

join(',')

Answer

The `join` filter concatenates list items with a specified delimiter, producing a single string.

Question 2

What does the `default` Jinja2 filter do in an Ansible variable expression like `{{ my_var | default('N/A') }}`?

Accepted Answer

Returns 'N/A' if my_var is undefined or empty

Answer

The `default` filter returns the specified fallback value when the variable is undefined, preventing template errors.

Question 3

Which conditional syntax correctly checks if a variable is defined in an Ansible task?

Accepted Answer

when: my_var is defined

Answer

The `is defined` Jinja2 test is the correct Ansible idiom for checking variable existence.

Question 4

What is the role of `set_fact` with `cacheable: true` in a playbook?

Accepted Answer

Persists the fact to the Ansible fact cache for future plays

Answer

`cacheable: true` causes `set_fact` to write the variable to the configured fact cache backend so it survives across playbook runs.

Question 5

How do you register a task result and use it in a subsequent conditional?

Accepted Answer

Use `register` to store the result and `when` to reference the registered variable

Answer

`register` saves a task's return value to a named variable, which can then be tested with `when` in later tasks.

Ansible Automation Practice Test