Juniper JN0-420 Online Practice Questions and Exam Preparation

Juniper JN0-420 Online Questions & Answers

• Question 1:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, the configuration components are displayed in which format?

  A. XML
  B. JSON
  C. YAML
  D. YANG
  B. JSON

• Question 2:

  Using the RESTful API on a Junos device, you are able to retrieve configuration information in which three formats? (Choose three)

  A. YAML
  B. XML
  C. plain text
  D. GPB
  E. JSON
  B. XML
  C. plain text
  E. JSON

  ---

  explanation:

  Reference: https://www.juniper.net/documentation/en_US/junos/information-products/pathway-pages/rest-api/rest-api.html

• Question 3:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, what should be replaced with to correctly print out the exception message Cannot connect to device?

  A. RpcError
  B. ConnectError
  C. PermissionError
  D. CommitError
  B. ConnectError

• Question 4:

  Your organization is creating a custom YANG module. You are asked to create a leaf node called timeout with a data type of duration. In this scenario, what is the appropriate syntax for this leaf node?

  

  

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  D. Option D

• Question 5:

  You want to implement a function that is available in the Junos OS , but not defined in a standard model. Which statement would you use with YANG to accomplish this task?

  A. augment
  B. deviation
  C. case
  D. choice
  D. choice

• Question 6:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, which Python statement selects the element for the user logged in on the pts/2 TTY?

  A. response.find("./uptime-information/user-table/user-entry/tty='pts/2'")
  B. response.find("./uptime-information/user-table/[tty='pts/2']/user-entry")
  C. response.find("../user-entry/[tty='pts/2']")
  D. response.find("./uptime-information/user-table/user-entry@tty='pts/2'")
  B. response.find("./uptime-information/user-table/[tty='pts/2']/user-entry")

• Question 7:

  Which pair of daemons in the Junos OS handle automation?

  A. mgd and jsd
  B. mgd and JET
  C. jsd and gRPC
  D. JET and gRPC
  A. mgd and jsd

• Question 8:

  Which data serialization method does the Junos CLI use to communicate with the Junos management process (mgd)?

  A. JSON
  B. gRPC
  C. XML
  D. YAML
  C. XML

• Question 9:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, what is the execution order of tasks in the Ansible playbook?

  A. Task A > Task B
  B. Task A > Task B > Task C
  C. Task C > Task B
  D. Task C > Task B > Task A
  A. Task A > Task B

  ---

  explanation:

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

• Question 10:

  Which statement describes the purpose of Ansible roles?

  A. A collection of hosts that have been categorized by purpose
  B. A collection of permissions for users of your Ansible setup
  C. A collection of tasks to be run on a given set of hosts
  D. A collection of Ansible playbooks
  C. A collection of tasks to be run on a given set of hosts

  ---

  explanation:

  Reference: http://docs.ansible.com/ansible/latest/playbooks_reuse_roles.html