Juniper Juniper Certifications JN0-420 Questions & Answers

• Question 21:

  Which format does an Ansible playbook use?

  A. JSON

  B. YAML

  C. XML

  D. CSV

  Correct Answer: B

  Reference: https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/task/program/junosansible-playbooks-creating-executing.html

• Question 22:

  What are two format distinctions to know when using YAML? (Choose two)

  A. white space indentation sensitive

  B. tab indentation not allowed

  C. tab indentation allowed

  D. white space indentation insensitive

  Correct Answer: AB

  Because YAML is white-space sensitive and indentation is significant (not allowed), you should always use spaces rather than tabs when creating playbooks. In YAML, items preceded by a hyphen (-) are considered list items, and the key:value notation represents a hash. Reference: https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/task/program/junosansible-playbooks-creating-executing.html

• Question 23:

  In a Python commit script, which object provides the post-inheritance candidate configuration?

  A. Commit-Script-Input

  B. Junos_Configuration

  C. Candidate_Configuration

  D. Checkout_Configuration

  Correct Answer: B

  Python automation scripts import the Junos_Context dictionary when the script must access information about the script execution environment. The Junos_Configuration object is required when the commit script must read and manipulate the post-inheritance candidate configuration. Reference: https://www.juniper.net/documentation/en_US/junos/topics/reference/general/junos-scriptautomation-boilerplate-commit-scripts.html

• Question 24:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, which exception is raised if the RPC takes 40 seconds to return a complete response?

  A. jnpr.junos.exception.RpcError

  B. jnpr.junos.exception.ConnectTimeoutError

  C. jnpr.junos.exception.RpcTimeoutError

  D. jnpr.junos.exception.LockError

  Correct Answer: C

  Explanation: By default, the timeout value is 30 seconds, if this is exceeded a jnpr.junos.exception.RpcTimeoutError error is received.

• Question 25:

  With the inclusion of Python in the Junos OS, what is an advantage that this feature provides administrators?

  A. It provides the Python command line (REPL) for testing

  B. It provides compatibility with all Python versions

  C. The ability to execute Python scripts on the device

  D. The ability to compile Python scripts on the device

  Correct Answer: C

• Question 26:

  Click the Exhibit button. Exhibit:

  

  An automation developer is using command-line scripting and wants to briefly survey NETCONF

  capabilities before running a new task.

  Referring to the exhibit, how does the automation developer end the current NETCONF session and go to

  the next one?

  A. Use the command.

  B. Use the quit command

  C. Use the logout command

  D. Use the command.

  Correct Answer: D

  Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/operational/netconf-sessionclosing.html

• Question 27:

  What are two benefits of network automation? (Choose two)

  A. to enforce consistency in automated devices

  B. to increase programming language fluency

  C. to provide historical configuration management

  D. to improve product lifecycle management

  Correct Answer: AD

• Question 28:

  What are three elements of a JET notification message? (Choose three)

  A. time

  B. severity

  C. username

  D. subscription type

  E. hostname

  Correct Answer: ABE

  JET notification is delivered in JSON format. The JSON message has two parts, one the header, and other the event-information portion, called attributes. The header is common for all events. It contains the event ID, hostname, time, severity, and facility of the event. The attributes vary depending event's topic name. Reference: https://www.juniper.net/documentation/en_US/jet1.0/topics/concept/jet-notification-apioverview.html

• Question 29:

  What is correctly formatted JSON string?

  

  

  

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 30:

  Which data serialization is used between RubyEZ and a Junos device?

  A. SNMP

  B. OpenConfig

  C. XML

  D. automated CLI

  Correct Answer: B