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Juniper JN0-421 Exam Syllabus Topics:
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Juniper JN0-421 Exam Certification Details:
| Duration | 90 minutes |
| Exam Price | $300 USD |
| Exam Code | JN0-421 JNCIS-DevOps |
| Number of Questions | 65 |
| Exam Name | Automation and DevOps Specialist |
| Sample Questions | Juniper JN0-421 Sample Questions |
NEW QUESTION 37
Click the Exhibit button.
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 logout command.
- B. Use the <rpc><kill-ession><kill-session></>pc> command.
- C. Use the quit command.
- D. Use the <rpc><kill-ession></close-session></>pc> command.
Answer: B
NEW QUESTION 38
Click the Exhibit button.
Referring to the exhibit, which Python statement selects the <user-entry> element for the user logged in on the pts/2 TTY?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: C
NEW QUESTION 39
You want to implement a function that is available in the Junson OS, but not defined in a standard model.
Which statement would you use with YANG to accomplish this task?
- A. case
- B. deviation
- C. augment
- D. choice
Answer: D
NEW QUESTION 40
Which two statements are correct about JSON characteristics? (Choose two.)
- A. JSON is easy to read for humans and devices.
- B. JSON is programming language independent
- C. JSON is a supported template language.
- D. JSON uses # # for comments
Answer: A,B
NEW QUESTION 41
Which statement describes the relationship between YANG and NETCONF?
- A. YANG is the programming language used to generate base classes to develop the NETCONF protocol.
- B. YANG models the state and configuration data manipulated by the NETCONF protocol.
- C. NETCONF models XML data use to program YANG modules.
- D. NETCONF is the programming language used to create the state and configuration data manipulaterd by YANG.
Answer: D
NEW QUESTION 42
Using the RESTful API on a Junos device, you are able to retrieve configuration information in which three formats? (Choose three)
- A. XML
- B. plain text
- C. JSON
- D. YAML
- E. GPB
Answer: A,B,C
NEW QUESTION 43
What are three elements of a JET notification message? (Choose three)
- A. hostname
- B. subscription type
- C. severity
- D. username
- E. time
Answer: A,C,E
Explanation:
Explanation
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.
References:
NEW QUESTION 44
Click the Exhibit button.
How would you test the configuration snippet shown in the exhibit?
- A. Use the root@routers logger -e SSH_LOGIN_FAILED command.
- B. Use the root@routers test SSH_LOGIN_FAILED command.
- C. Use the root@routers event SSH_LOGIN_FAILED command.
- D. Use the root@routers logger SSH_LOGIN_FAILED command.
Answer: A
NEW QUESTION 45
A customer has a control machine with a default Ansible installation. During execution of an Ansible module, the Ansible control machine generates the no hosts matched error.
Which statement is correct in this scenario?
- A. The target device was not defined in /etc/ansible/invertory/hosts on the control machine.
- B. The target device was not defined in /etc/hosts on the control machine.
- C. The target device was not defined on the associated DNS servers.
- D. The target device was not defined in /etc/ansible/hosts on the control machine.
Answer: D
NEW QUESTION 46
Click the Exhibit button.
Exhibit:
While using NETCONF, the developer attempts to lock the configuration, but the error shown in the exhibit is received. The developer verifies no one else is configuring the device.
According to Juniper, how would you clear the error in this scenario?
- A. Log in with another NETCONF session and enter the
<rpc><kill-session><session-id>user02</session-id></kill-session></rpc>]]>]]> command - B. Log in with another NETCONF session and enter the
<rpc><close-session>8099</close-session></rpc>]]>]] command - C. Log in with another NETCONF session, reboot the instance, and save the original configuration
- D. Log in with another NETCONF session and enter the
<rpc><kill-session><session-id>8099</session-id></kill-session></rpc>]]>]]> command
Answer: D
Explanation:
Explanation
https://www.juniper.net/documentation/en_US/junos/topics/reference/tag-summary/netconf-kill-session.html
NEW QUESTION 47
What is a valid method for determining the Junos RPC associated with the show version command?
- A. Option D
- B. Option A
- C. Option C
- D. Option B
Answer: C
Explanation:
Explanation
https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-rpcs-executing.html#
NEW QUESTION 48
The <rpc-reply> XML tag is a member of which NETCONF protocol layer?
- A. Messages
- B. Transport
- C. Operations
- D. Content
Answer: B
NEW QUESTION 49
Which command is valid for accessing a Junos device using the RESTful API on the default port?
A)
B)
C)
D)
- A. Option D
- B. Option A
- C. Option C
- D. Option B
Answer: C
NEW QUESTION 50
Click the Exhibit button.
You are using RubyEZ to interface with a Junos device, however, you are not successfully connecting to the device.
Referring to the exhibit, what is the problem?
- A. A Junos::Ez::Provider statement is missing before the Netconf::SSH.nw statement.
- B. Netconf::SSH.new statement arguments must be hashes.
- C. Netconf::SSH.new statement only expects an IP address of the target device.
- D. Arguments passed to Netconf::SSH.new statement must be referenced as variables.
Answer: D
NEW QUESTION 51
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 Junson OS can execute it.
Which two privilege levels would be used to accomplish this task? (Choose two.)
- A. super-user
- B. read-only
- C. root
- D. operator
Answer: D
NEW QUESTION 52
Drag and drop
In the Python commit script, which object provides the post-inheritance candidate configuration?
- A. Canadidate_ Configuration
- B. Commit-Script-Input
- C. Junos_ Configuration
- D. Checkout_Configuration
Answer: D
NEW QUESTION 53
What are two benefits of network automation? (Choose two )
- A. to provide historical configuration management
- B. to enforce consistency in automated devices
- C. increase programming language fluency
- D. to improve product lifecycle management
Answer: B,D
NEW QUESTION 54
Click the Exhibit button.
Exhibit:
How would you test the configuration snippet shown in the exhibit?
- A. Use the root@router% event SSHD_LOGIN_FAILED command
- B. Use the root@router% test SSHD_LOGIN_FAILED command
- C. Use the root@router% logger -e SSHD_LOGIN_FAILED command
- D. Use the root@router% logger SSHD_LOGIN_FAILED command
Answer: C
NEW QUESTION 55
Click the Exhibit button.
Referring to the exhibit, what are two results of the Python operational script? (Choose two.)
- A. It does not commit the configuration
- B. It commits the configuration
- C. It deactivates a user-selected interface.
- D. It disables a user-selected interface.
Answer: C
NEW QUESTION 56
What are three ways for PyEZ to connect to supported Junos devices? (Choose three.)
- A. JET API
- B. Telnet
- C. Webook
- D. NETCONF over SSH
Answer: D
NEW QUESTION 57
With which three processes does the JET service process communicate? (Choose three)
- A. ancpd
- B. cosd
- C. snmpd
- D. rpd
- E. mgd
Answer: C,D,E
NEW QUESTION 58
In SLAX, what is the difference between the jcs : invoke ( ) and the jcs : execute ( ) functions?
- A. RPCs called by jcs : invoke ( ) are not executed until the conclusion of the script.
- B. RPCs called by jcs : execute ( ) are not executed until the conclusion of the script.
- C. RPCs called by jcs : execute ( ) are executed within an existing connection.
- D. RPCs called by jcs : invoke ( ) are executed within an existing connection.
Answer: A
NEW QUESTION 59
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