Amazon Amazon Certifications DOP-C02 Questions & Answers

• Question 381:

  What is the proper (best practice) way to begin a playbook?

  A. - hosts: all

  B. ...

  C. ###

  D. --

  Correct Answer: D

  All YAML files can begin with `---' and end with `...' to indicate where YAML starts and ends. While this is optional, it is considered best practice.

  Reference: http://docs.ansible.com/ansible/YAMLSyntax.html

• Question 382:

  Which difference between core modules and extra modules is not correct?

  A. Extra modules may one day become core modules

  B. Core modules are supported by the Ansible team

  C. Core modules are shipped by default with Ansible

  D. Extra modules have no support

  Correct Answer: D

  While extra modules are not official modules and thus not supported by the Ansible team, they are indeed supported by their writers and the community.

  Reference: http://docs.ansible.com/ansible/modules_extra.html

• Question 383:

  Ansible provides some methods for controlling how or when a task is ran. Which of the following is a valid method for controlling a task with a loop?

  A. - with:

  B. - with_items:

  C. - only_when:

  D. - items:

  Correct Answer: B

  Ansible provides two methods for controlling tasks, loops and conditionals. The "with_items" context will allow the task to loop through a list of items, while the `when' context will allow a conditional requirement to be met for the task to run. Both can be used at the same time.

  Reference: http://docs.ansible.com/ansible/playbooks_conditionals.html#loops-and-conditionals

• Question 384:

  Which resource cannot be defined in an Ansible Playbook?

  A. Fact Gathering State

  B. Host Groups

  C. Inventory File

  D. Variables

  Correct Answer: C

  Ansible's inventory can only be specified on the command line, the Ansible configuration file or in environment variables.

  Reference: http://docs.ansible.com/ansible/intro_inventory.html

• Question 385:

  When specifying multiple variable names and values for a playbook on the command line, which of the following is the correct syntax?

  A. ansible-playbook playbook.yml -e `host="foo" pkg="bar"'

  B. ansible-playbook playbook.yml -e `host: "foo", pkg: "bar"'

  C. ansible-playbook playbook.yml -e `host="foo"' -e `pkg="bar"'

  D. ansible-playbook playbook.yml --extra-vars "host=foo", "pkg=bar"

  Correct Answer: A

  Variables are passed in a single command line parameter, `-e' or `--extra-vars'. They are sent as a single string to the playbook and are space delimited. Because of the space delimeter, variable values must be encapsulated in quotes. Additionally, proper JSON or YAML can be passed, such as: `-e `{"key": "name", "array": ["value1", "value2"]}'.

  Reference: http://docs.ansible.com/ansible/playbooks_variables.html#passing-variables-on-the-commandline

• Question 386:

  When Ansible's connection state is set to `remote', what method of communication does Ansible utilize to run commands on the remote target host?

  A. SSH

  B. RSH

  C. PSExec

  D. API call to Ansible client on host

  Correct Answer: A

  Ansible does not require a client/server architecture and makes all remote connections over SSH. Ansible utilizes the Paramiko Python libraries for SSH when the native system OpenSSH libraries do not meet the requirements. Also note, Ansible does require Python be installed on the target host. When the target host is Windows, it uses WinRS

  Reference: http://docs.ansible.com/ansible/intro_getting_started.html#remote-connection-information

• Question 387:

  What are the bare minimum requirements for a valid Ansible playbook?

  A. The hosts, connection type, fact gathering, vars and tasks.

  B. The hosts declaration and tasks

  C. A YAML file with a single line containing `---'.

  D. At least one play with at least a hosts declaration

  Correct Answer: D

  Ansible Playbooks are a series of plays and must contain at a minimum, one play. A play generally consists of hosts to run on, a list of tasks, variables and roles, and any additional instructions, such as connection type, fact gathering, remote

  username, etc. that the tasks will need to complete. The only requirement for a valid play is to declare the hosts.

  Reference:

  http://docs.ansible.com/ansible/playbooks_intro.html

• Question 388:

  When running a playbook on a remote target host you receive a Python error similar to "[Errno 13] Permission denied: `/home/nick/.ansible/tmp'. What would be the most likely cause of this problem?

  A. The user's home or `.ansible' directory on the Ansible system is not writeable by the user running the play.

  B. The specified user does not exist on the remote system.

  C. The user running `ansible-playbook' must run it from their own home directory.

  D. The user's home or `.ansible' directory on the Ansible remote host is not writeable by the user running the play

  Correct Answer: D

  Each task that Ansible runs calls a module. When Ansible uses modules, it copies the module to the remote target system. In the error above it attempted to copy it to the remote user's home directory and found that either the home directory or the `.ansible' directory were not writeable and thus could not continue.

  Reference: http://docs.ansible.com/ansible/modules_intro.html

• Question 389:

  Which of the following is an invalid variable name in Ansible?

  A. host1st_ref

  B. host-first-ref

  C. Host1stRef

  D. host_first_ref

  Correct Answer: B

  Variable names can contain letters, numbers and underscores and should always start with a letter. Invalid variable examples, `host first ref', `1st_host_ref''.

  Reference: http://docs.ansible.com/ansible/playbooks_variables.html#what-makes-a-valid-variable-name

• Question 390:

  Which is the proper syntax for referencing a variable's value in an Ansible task?

  A. ${variable_name}

  B. { variable_name }

  C. "{{ variable_name }}"

  D. @variable_name

  Correct Answer: C

  We use the variable's name to reference the variable which we encapsulate in curly brackets `{{ }}'; however, the YAML syntax dictates that a string beginning with a curly bracket denotes a dictionary value. To get around this, it is proper to wrap the variable declaration in quotes.

  Reference: http://docs.ansible.com/ansible/playbooks_variables.html#hey-wait-a-yaml-gotcha