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Juniper JN0-223 Test Dumps

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Question # 1



A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)
A. POST
B. HEAD
C. GET
D. CONNECT



A.
  POST


C.
  GET

Explanation:

REST APIs use HTTP methods to perform different operations on resources. In the context of RPC (Remote Procedure Call) requests:

GET:This method is used to retrieve data from the server. In a REST API, it is commonly used to fetch information about resources, such as the current configuration or operational state.

POST:This method is used to send data to the server to create or update a resource. In the context of RPC, POST is often used to execute a procedure on the server that may result in the modification of a resource or triggering of an action.

Options B (HEAD) and D (CONNECT) are not typically used for executing RPC requests:

HEADis similar to GET but only retrieves the headers, not the body of the response.

CONNECTis used to establish a tunnel to the server, primarily for SSL-encrypted communication, and is not commonly associated with RESTful RPC operations.

Supporting References:

Juniper Networks REST API Documentation:The documentation provides detailed information about the use of HTTP methods in Juniper's RESTful services.

"RESTful Web Services"by Leonard Richardson and Sam Ruby: This book explains the principles of REST and how different HTTP methods, particularly GET and POST, are used to interact with RESTful APIs.





Question # 2



What is the difference between a list and a tuple in Python?
A. Lists are immutable objects thatuse square brackets, and tuplesare mutable objects that use parentheses.
B. Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses.
C. Lists are immutable objects that use parentheses, and tuples are immutable objects that use square brackets.
D. Lists are mutable objects that use parentheses, and tuples are immutable objects that use square brackets.



B.
  Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses.

Explanation:

In Python, the distinction between lists and tuples is essential for efficient programming:

Lists:

Mutable (B): This means that once a list is created, its elements can be changed, added, or removed. Lists are versatile and commonly used when the data is expected to change.

Square Brackets: Lists are defined using square brackets[].

Example:

my_list = [1, 2, 3]

my_list[0] = 10 # Modifying the first element

Tuples:

Immutable (B): Once a tuple is created, it cannot be altered. Tuples are used when a fixed collection of items is needed, providing more integrity to the data.

Parentheses: Tuples are defined using parentheses().

Example:

my_tuple = (1, 2, 3)

# my_tuple[0] = 10 # This would raise an error because tuples are immutable

Python Official Documentation: The Python Language Reference provides detailed information on data types like lists and tuples, including their mutability and syntax.

Automation Scripts: In the context of automation, understanding when to use mutable or immutable data structures can significantly impact script performance and reliability.





Question # 3



What are two Junos PyEZ configuration object methods? (Choose two.)
A. commie ()
B. device ()
C. lockO
D. config ()



C.
  lockO


D.
  config ()

Explanation:

In Junos PyEZ, theConfigobject provides various methods for interacting with device configurations. Two of the key methods are:

lock():This method locks the candidate configuration database to prevent other users or processes from making changes while you are modifying the configuration.

config():This method is used to create aConfigobject that represents the configuration database, allowing you to load, modify, and commit configuration changes.

Option C (lock)andOption D (config)are correct because they are valid methods provided by the PyEZConfigobject.

Option A (commie)andOption B (device)are incorrect as they are not methods of theConfigobject.

Supporting References:

Junos PyEZ Documentation:Details the methods available in theConfigobject, includinglock()andconfig().





Question # 4



Which two statements are valid regarding Junos automation? (Choose two.)
A. The jsd process handles XML API calls.
B. The mgd process handles JET API requests.
C. The jsd process handles JET API requests.
D. The mod process handles XML API calls.



A.
  The jsd process handles XML API calls.


C.
  The jsd process handles JET API requests.

Explanation:

In Junos automation, several processes handle API requests, and understanding which process handles what is crucial:

jsd Process:

XML API Calls (A): Thejsdprocess is responsible for handling XML API calls, which are a significant part of Junos automation. XML API allows for structured and standardized communication with Junos devices, enabling automation scripts to query and configure devices.

JET API Requests (C): Thejsdprocess also handles JET (Junos Extension Toolkit) API requests. JET provides a more modern, programmable interface for interacting with Junos OS, andjsdis the process that manages these interactions.

mgd Process(Incorrect Option):

Not for JET API Requests: Themgdprocess handles general management operations, such as CLI commands and managing the configuration database, but it does not handle JET API requests. That role is fulfilled byjsd.

mod Process(Incorrect Option):

Not for XML API Calls: Themodprocess deals with managing chassis components and is not involved in handling XML API calls.

Juniper Networks JET and XML API Documentation: Describes the roles ofjsdin handling both XML and JET API requests.

Junos Automation and DevOps Documentation: Provides insights into how different processes interact with Junos APIs.





Question # 5



Which two statements about Ansible are correct? (Choose two.)
A. Ansible can use a single playbook to configure devices from multiple vendors.
B. Ansible modules must be written in Go.
C. Ansible is an open source project.
D. Ansible requires a license to unlock full functionality.



A.
  Ansible can use a single playbook to configure devices from multiple vendors.


C.
  Ansible is an open source project.





Question # 6



What is the correct Python script syntax to prompt for input?
A. hostIP = input("Device IP address: ")
B. hostIP = input{Device IP address: }
C. hostIP = input"Device IP address: "
D. input("Device IP address: ") = hostIP



A.
  hostIP = input("Device IP address: ")

Explanation:

In Python, the correct syntax to prompt the user for input and store that input in a variable is:

input(prompt): Theinput()function is used to take input from the user. The string provided as an argument (inside the parentheses) is displayed as a prompt to the user. The input provided by the user is returned as a string and can be stored in a variable.

Example:

hostIP = input("Device IP address: ")

In this example,"Device IP address: "is the prompt displayed to the user, and the user's input will be stored in the variablehostIP.

Options B, C, and D are syntactically incorrect in Python.

Python Official Documentation: Describes the use of theinput()function for getting user input.

Python Tutorials: Various tutorials demonstrate how to properly use theinput()function in scripts.





Question # 7



Which development model is the classic approach to software development?
A. Waterfall
B. Scrum
C. Kanban
D. Lean



A.
  Waterfall





Question # 8



Which two statements about NETCONF layers are correct? (Choose two.)
A. NETCONF layers use the messages layer to receive RPCs from a remote NETCONF server.
B. NETCONF layers use the messages layer to send RPCs to a remote NETCONF server.
C. NETCONF layers use the operations layer to receive RPCs from a remote NETCONF server.
D. NETCONF layers use the operations layer to send RPCs to a remote NETCONF server.



B.
  NETCONF layers use the messages layer to send RPCs to a remote NETCONF server.


C.
  NETCONF layers use the operations layer to receive RPCs from a remote NETCONF server.

Explanation:

NETCONF (Network Configuration Protocol) is a standard protocol defined for managing network devices. NETCONF operates in a layered architecture, which includes the following key layers:

Operations Layer: This layer deals with the actual operations like , , , and others. It receives RPC (Remote Procedure Call) requests from a remote NETCONF client and processes these requests.

Messages Layer: This layer is responsible for encoding the RPCs and sending them over the network. It handles the communication between the NETCONF client and server, ensuring that the RPC messages are correctly formatted (usually in XML) and transmitted.

Statement Bis correct because the Messages layer is responsible for sending RPCs to a remote NETCONF server.

Statement Cis correct because the Operations layer is where the NETCONF server receives and processes the RPCs sent by the client.

Supporting References:

Juniper Networks NETCONF Documentation:Provides a detailed breakdown of the NETCONF protocol layers and their functions.

RFC 6241:The official specification for NETCONF, which describes the layered architecture, including the operations and messages layers.





Question # 9



You want to use a Python package or module. In this scenario, which statement would accomplish this task?
A. reap
B. dir
C. input
D. Import



D.
  Import

Explanation:

In Python, to use a package or module, you use theimportstatement. This statement allows you to load a module into your script so that you can use its functions, classes, and variables. For example, if you wanted to use themathmodule, you would writeimport math. This makes all the functions and constants in themathmodule available for use in your program.

Option A (reap), B (dir), and C (input)do not serve the purpose of importing modules.diris used to list the attributes of an object,inputis used to get user input, andreapis not a valid Python command related to importing modules.

Supporting References:

Python Documentation on Imports:The Python documentation provides clear guidelines on how to use theimportstatement to include modules in your Python scripts.




Question # 10



Using the set rest control configuration command, what are two ways to control access to the REST API running on a Junos device? (Choose two.)
A. Limit management access to only SSH
B. Limit management access to specific users
C. Limit the number of simultaneous connections.
D. Limit access to only certain source IP addresses



C.
  Limit the number of simultaneous connections.


D.
  Limit access to only certain source IP addresses

Explanation:

When using theset rest control configurationcommand on a Junos device, you have several options to control access to the REST API. Two effective methods include:

Limiting the number of simultaneous connections:This ensures that the REST API is not overwhelmed by too many concurrent requests, which could potentially lead to performance issues or denial of service.

Limiting access to certain source IP addresses:This method restricts API access to specific IP addresses, enhancing security by ensuring that only trusted sources can interact with the REST API.

Option A (Limit management access to only SSH)is unrelated to controlling REST API access specifically.

Option B (Limit management access to specific users)might be relevant in a different context, but it is not directly tied to REST API control via the specific command mentioned.

Supporting References:

Juniper Networks REST API Documentation:This documentation explains how to configure and control access to the REST API on Junos devices, including connection limits and IP-based access control.




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Automation and DevOps Associate (JNCIA-DevOps) Exam Dumps


Exam Code: JN0-223
Exam Name: Automation and DevOps Associate (JNCIA-DevOps)

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