Download Automation and DevOps, Specialist.JN0-420.CertKiller.2018-10-12.40q.vcex
| Vendor: | Juniper |
| Exam Code: | JN0-420 |
| Exam Name: | Automation and DevOps, Specialist |
| Date: | Oct 12, 2018 |
| File Size: | 309 KB |
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Demo Questions
Question 1
Which statement describes the relationship between YANG and NETCONF?
- YANG is the programming language used to generate base classes to develop the NETCONF protocol
- NETCONF models XML data used to program YANG modules
- YANG models the state and configuration data manipulated by the NETCONF protocol
- NETCONF is the programming language used to create the state and configuration data manipulated by YANG
Correct answer: C
Explanation:
Reference: https://tools.ietf.org/html/rfc6020 Reference: https://tools.ietf.org/html/rfc6020
Question 2
You have created an on-box script and want to deploy it on your device. You plan to place it in a directory where the Junos OS can execute it.
Which two privilege levels would be used to accomplish this task? (Choose two)
- read-only
- super-user
- root
- operator
Correct answer: BC
Explanation:
Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/junos-script-automation-script-storing-enabling.html Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/junos-script-automation-script-storing-enabling.html
Question 3
You are asked by your manager to automatically switch traffic from the primary link to the backup link on the MX Series device at the branch site whenever latency is above 300 ms over a 5-minute period.
Which type of Junos script would you use in this scenario?
- Op
- SNMP
- Commit
- Event
Correct answer: D
Explanation:
Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/junos-script-automation-overview.html Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/junos-script-automation-overview.html
Question 4
With which three processes does the JET service process communicate? (Choose three)
- snmpd
- ancpd
- cosd
- mgd
- rpd
Correct answer: ADE
Question 5
In SLAX, what is the difference between the jcs:invoke () and the jcs:execute () functions?
- RPCs called by jcs:execute () are executed within an existing connection
- RPCs called by jcs:invoke () are executed within an existing connection
- RPCs called by jcs:invoke () are not executed until the conclusion of the script
- RPCs called by jcs:execute () are not executed until the conclusion of the script
Correct answer: A
Question 6
You want to enable an unsigned Python op script named inventory.py that will be stored on a local Junos device.
Which two commands are needed to accomplish this task? (Choose two)
- set system scripts op allow-url-for-python
- set system scripts op file inventory.py
- set system scripts op no-allow-url
- set system scripts language python
Correct answer: BD
Explanation:
Reference: https://www.juniper.net/documentation/en_US/junos/topics/example/junos-script-automation-op-script-changing-configuration-python.html Reference: https://www.juniper.net/documentation/en_US/junos/topics/example/junos-script-automation-op-script-changing-configuration-python.html
Question 7
What are three ways for PyEZ to connect to supported Junos devices? (Choose three)
- NETCONF over SSH
- serial interface
- Telnet
- JET API
- Webhook
Correct answer: ABC
Explanation:
Reference: https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-connection-methods.html Reference: https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-connection-methods.html
Question 8
Referring to the exhibit, what is the type of the myConfig variable on line 17 of the Python script?
- template
- dictionary
- string
- list
Correct answer: A
Explanation:
Reference: https://www.juniper.net/documentation/en_US/cso3.1/topics/task/operational/cd-config-template-working-config-designing.html Reference: https://www.juniper.net/documentation/en_US/cso3.1/topics/task/operational/cd-config-template-working-config-designing.html
Question 9
The <rpc-reply> XML tag is a member of which NETCONF protocol layer?
- Transport
- Content
- Messages
- Operations
Correct answer: A
Explanation:
The NETCONF protocol uses an RPC-based communication model. NETCONF peers use <rpc> and <rpc-reply> elements to provide transport-protocol-independent framing of NETCONF requests and responses. Reference: https://tools.ietf.org/html/rfc6241 The NETCONF protocol uses an RPC-based communication model. NETCONF peers use <rpc> and <rpc-reply> elements to provide transport-protocol-independent framing of NETCONF requests and responses.
Reference: https://tools.ietf.org/html/rfc6241
Question 10
The Ansible playbook shown in the exhibit is executed against a set of Junos network devices. Each Junos device is configured with a user account in the super-user login class. The user account uses SSH-key-based authentication with a passphrase of user123.
What is the result of executing this playbook against the Junos network devices?
- The playbook executes, but fails with a “ConnectAuthError” due to the missing passphrase argument to the junos_get_facts module
- The playbook fails due to a YAML syntax error.
- The playbook executes and prints the version of Junos running on each network device as the value of response.facts.version
- The playbook executes and prints “VARIABLE IS NOT DEFINED!” as the value response.facts.version
Correct answer: C
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