Current JN0-421 Exam Dumps [2022] Complete Juniper Exam Smoothly
JN0-421 Premium PDF & Test Engine Files with 66 Questions & Answers
Juniper JN0-421 Exam Syllabus Topics:
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NEW QUESTION 39
What is the purpose of an __init__.py file?
- A. An __init__.py file indicates to the Python interpreter that a directory contains Python packages or modules
- B. An __init__.py file contains strings for additional directories that the Python interpreter adds to sys.path
[] - C. An __init__.py file initializes a Python application with default values for instantiated objects
- D. __init__.py file sets all magic attributes with the __init__.prefix with the appropriate default values
Answer: A
NEW QUESTION 40
Click the Exhibit button.
Exhibit:
Referring to the exhibit, what is the execution order of tasks in the Ansible playbook?
- A. Task C > Task B
- B. Task A > Task B > Task C
- C. Task A > Task B
- D. Task C > Task B > Task A
Answer: C
NEW QUESTION 41
To which component(s) does the JET service APIs provide access?
- A. YANG modules
- B. XML APIs
- C. control plane
- D. forwarding plane
Answer: C
NEW QUESTION 42
What are two format distinctions to know when using YAML? (Choose two)
- A. white space indentation insensitive
- B. tab indentation allowed
- C. white space indentation sensitive
- D. tab indentation not allowed
Answer: C,D
Explanation:
Explanation
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.
References:
NEW QUESTION 43
What are two benefits of network automation? (Choose two )
- A. increase programming language fluency
- B. to enforce consistency in automated devices
- C. to provide historical configuration management
- D. to improve product lifecycle management
Answer: B,D
NEW QUESTION 44
Which two primary processes are used by Juniper devices for on-box or off-box automation? (Choose two)
- A. jsd
- B. rpd
- C. ancpd
- D. mgd
Answer: A,D
NEW QUESTION 45
What are three types of Juniper on-box scripts? (Choose three)
- A. Ansible
- B. expect
- C. operational
- D. event
- E. commit
Answer: A,C,E
NEW QUESTION 46
You are writing a SLAX op script to provide a customized rendition of the show interface output. You want to include a command-line argument named interface and provide it whit the default value of fxp0.
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Answer: C
NEW QUESTION 47
Click the Exhibit button.
Referring to the exhibit, what is the type of the myConfig variable on line 17 of the Python script?
- A. template
- B. dictionary
- C. string
- D. list
Answer: A
NEW QUESTION 48
Which messaging protocol do JET service APIs use to interface with the Junos OS?
- A. MQTT
- B. gRPC
- C. NETCONF
- D. Rabbit MQ
Answer: D
NEW QUESTION 49
What is the purpose of an _intit_.py file ?
- A. An_init_.py file contains strings for additional directories that the Python interpreter adds to sys.path [].
- B. An_init_.py file initializes a Python application with default values for instantiated objects.
- C. An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.
- D. An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.
Answer: B
NEW QUESTION 50
Using the REST ful API on Junos device, you are able to retrieve configuration information in which three formats? (choose three.)
- A. JSON
- B. XML
- C. plain text
- D. YAML
- E. GPB
Answer: A,B,D
NEW QUESTION 51
What is purpose of RubyEZ?
- A. to provide an off device interface to Ruby
- B. to provide a Ruby interface to the Junos Space management product
- C. to provide a Ruby framework for interfacing with Juniper devices
- D. to provide a Ruby interface to Juniper devices that support Puppet
Answer: C
NEW QUESTION 52
Click the Exhibit button.
Exhibit:
You are using RubyEZ to interact with a Junos device: however, you are not successfully connecting to the device.
Referring to the exhibit, what is the problem?
- A. Netconf::SSH.new statement arguments must be hashes
- B. Argument passed to Netconf:: SSH.new statement must be referenced as variables
- C. Netconf::SSH.new statement only expects an IP address of the target device
- D. A Junos::Ez::Provider statement is missing before the Netconf::SSH. New statement
Answer: B
NEW QUESTION 53
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 : invoke ( ) are executed within an existing connection.
- C. RPCs called by jcs : execute ( ) are executed within an existing connection.
- D. RPCs called by jcs : execute ( ) are not executed until the conclusion of the script.
Answer: A
NEW QUESTION 54
What are two format distinctions to know when using YAML? (Choose two.)
- A. tab indentation allowed
- B. whit space indentation sensitive
- C. tab indentation not allowed
- D. white space indentation insensitive
Answer: C,D
NEW QUESTION 55
What are three ways for PyEZ to connect to supported Junos devices? (Choose three)
- A. serial interface
- B. JET API
- C. Webhook
- D. Telnet
- E. NETCONF over SSH
Answer: A,D,E
NEW QUESTION 56
What are two attributes of the jsd JET service process? (Choose two)
- A. It creates a separate thread to service JET application requests
- B. It executes one API request per session
- C. It executes APIs from multiple sessions in parallel
- D. It supports only one client session at a time
Answer: A,C
Explanation:
Explanation
To support application interaction with Junos OS, the JETservice process (jsd), by default, uses TCP port
32767 to listen for and receive requests from applications to execute APIs. Whenever a request comes on the TCP port, jsd creates a separate thread to service the JET application request. The session remains established as long as the client and server are both up and able to communicate with each other. Over the lifetime of a session, jsd can execute many APIs, and it can execute APIs from multiple sessions in parallel. You can have a maximum of 8 active client sessions connected at any given time.
References:
NEW QUESTION 57
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 <rpc><kill-session></kill-session></rpc> command.
- B. Use the quit command
- C. Use the logout command
- D. Use the <rpc><close-session></close-session></rpc> command.
Answer: D
NEW QUESTION 58
A customer has a control machine with a default Ansible installation. During execution of an Ansible module against a Junos device, the Ansible control machine generates the
What is the cause for this error?
- A. router1.example.com was not defined in /etc/hosts on the control machine.
- B. router1.example.com was not defined in /etc/ansible/inventory/hosts on the control machine.
- C. Ansible cannot connect to the device through NTETCONF
- D. Ansible cannot authenticate to the device.
Answer: B
NEW QUESTION 59
You need to reset all Junson systems in your lab to their factory-default state and then push a new configuration to the device.
Which two Ansible modules would your playbook use to accomplish this task? (Choose two.)
- A. Junos_zeroize
- B. Junos_install_confi
- C. Junos_get_facts
- D. Junos_system_services
Answer: A
NEW QUESTION 60
By default, Python event scripts and SNMP script configured on a Junos device execute as which user ?
- A. snmpd
- B. nobody
- C. wheel
- D. root
Answer: B
NEW QUESTION 61
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