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Full JN0-223 Practice Test and 66 Unique Questions, Get it Now!

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QUESTION 24
Exhibit.

Referring to the exhibit, which two statements about the script are correct? (Choose two.)

 The script prints the name of each configured interface.

 The script retrieves the interface configuration in XML

 The script prints interface information for each interface name.

 The script retrieves the interface configuration in JSON.

QUESTION 25
Junos PyEZ tables are formatted using which file type?

 SON

 YAML

 txt

 IXML

Junos PyEZ uses YAML (YAML Ain’t Markup Language) files to define the format for tables and views when working with operational and configuration data. YAML is a human-readable data format that is commonly used for configuration files, making it suitable for defining data structures in PyEZ.
* Option B (YAML)is correct because PyEZ tables are defined using YAML files.
* Options A (JSON), C (txt), and D (IXML)are incorrect in this context, as YAML is the standard format used.
Supporting References:
* Junos PyEZ Tables Documentation:Explains the use of YAML files for formatting tables and views in Junos PyEZ.

QUESTION 26
What is the difference between a list and a tuple in Python?

 Lists are immutable objects thatuse square brackets, and tuplesare mutable objects that use parentheses.

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

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

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

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.
References:

QUESTION 27
Which two statements are correct about Junose PyEZ Tables and Views? (Choose two.)

 PyEZ Tables and Views are defined using CSV.

 The Juniper_Junos_config module enables the use of PyEZ Tables and Views.

 The juniper_junos_table module enables the use of PyEZ Tables and Views.

 PyEZ Tables and Views are defined using YAML.

QUESTION 28
Which two statements about NETCONF layers are correct? (Choose two.)

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

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

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

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

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 <get-config>, <edit-config>, <copy- config>, 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 29
Exhibit.

Referring to the exhibit, which two statements are correct? (Choose two)

 The Junos configuration database is automatically locked and unlocked.

 The connection to the Junos device is explicitly opened and closed

 The connection to the Junos device is automatically opened and closed

 The Junos configuration database is explicitly locked and unlocked

QUESTION 30
You are asked to use the REST API to retrieve interface configuration information from your Junos device.
You decide to use a cURL HTTP GET command to retrieve this information.
In this scenario, which two statements are correct? (Choose two.)

 You can retrieve this data in HTML or JSON formats.

 You must have SSH enabled on the Junos device.

 You can retrieve this data in XML or JSON formats.

 You must Include the authentication Information with each request.

When using the REST API to retrieve interface configuration information from a Junos device:
* Data Formats (C): The information can be retrieved inXMLorJSONformats. These are the two standard data formats supported by the Junos REST API for representing configuration and operational data.
* Authentication (D): For each HTTP request, especially when using tools like cURL,authentication information must be included. This is typically done using basic authentication (username and password) or an authentication token.
Option A is incorrect because HTML is not a supported format for REST API data retrieval in Junos, andOption B is incorrectbecause SSH is not required for REST API requests; the REST API typically uses HTTP/HTTPS.
* Junos REST API Documentation: Details the data formats (XML, JSON) supported by the Junos REST API and the need for authentication.
* cURL Usage with REST API: Provides examples of how to use cURL with Junos REST API, including the necessity of providing authentication.
References:

QUESTION 31
Exhibit

Referring to the exhibit, what is the output from the print(x) line?

 [‘b’, ‘c’]

 [‘b’, ‘c’, ‘d’]

 [‘a’, ‘b’, ‘c’]

 [‘a’, ‘b’]

Python 3.6.9 (default, Jan 26 2021, 15:33:00)
[GCC 8.4.0] on linux
Type “help”, “copyright”, “credits” or “license” for more information.
>>> my_list = [“a”, “b”, “c”, “d”, “e”, “f”, “g”]
>>> x = my_list[1:3]
>>> print(x)
[‘b’, ‘c’]
>>>

QUESTION 32
What are two important aspects of the DevOps culture? (Choose two.)

 communication

 separation of duties

 use of specific tools

 people

Two important aspects of the DevOps culture are:
* Communication (A): In a DevOps environment, continuous and effective communication between development, operations, and other stakeholders is crucial. It ensures that everyone is aligned, reduces misunderstandings, and facilitates faster and more efficient workflows.
* People (D): DevOps is as much about the people as it is about the processes and tools. The culture emphasizes collaboration, shared responsibility, and a mindset focused on continuous improvement.
Empowering people to work together across different disciplines is at the heart of DevOps.
Options B and C are not primary aspects of the DevOps culture. While tools are essential in implementing DevOps practices, the culture emphasizes communication and collaboration among people more than the use of specific tools or rigid separation of duties.
* DevOps Handbook: Discusses the cultural aspects of DevOps, with a focus on communication and people.
* DevOps Best Practices: Highlights the importance of fostering a culture that prioritizes collaboration and shared goals.
References:

QUESTION 33
Ansible playbooks are written in which format?

 YAML

 Python

 XML

 JSON

Ansible Playbooks are written in YAML

QUESTION 34
Which statement is correct about YAML?

 YAML strings must have quotation marks.

 YAML is not case-sensitive.

 YAML files must start

 YAML uses spaces for indentation

QUESTION 35
Which Junos configuration database is updated by PyEZ by default?

 shared

 dynamic

 private

 ephemeral

Aneventscript is used to automate responses to system events in Junos, such as an interface going down.
These scripts are triggered automatically when a specified event occurs, making them suitable for tasks like monitoring interface status and executing actions when the status changes.
* Option B (event)is correct because event scripts are designed for reacting to system events like an interface going down.
* Option A (commit)is used for configuration changes,Option C (operation)is used for operational tasks, andOption D (SNMP)is not applicable in this context.
Supporting References:
* Juniper Networks Event Scripts Documentation:Details how event scripts are used to automate responses to specific system events in Junos

QUESTION 36
Which two statements are true about an XML schema document? (Choose two.)

 It is formatted as an XLT file.

 It cannot be examined in the Junos CLI.

 It is an authoritative source for operational and configuration XML.

 lit is formatted as an XSD file.

An XML schema document (XSD) is a key component in defining the structure and constraints of XML data used in various applications, including Junos:
* Authoritative Source (C): An XML schema document serves as the authoritative definition of the structure, content, and semantics of XML documents. It ensures that the XML data adheres to specific rules and formats, which is essential for both operational and configuration XML.
* XSD Format (D): XML schema documents are typically written in the XSD (XML Schema Definition) format, which provides a formal description of the XML document’s structure.
Option A is incorrectbecause XML schemas are not formatted as XLT files (which are related to XSLT transformations), andOption B is incorrectbecause XML schemas can indeed be examined in the Junos CLI using appropriate commands.
* W3C XML Schema Definition Language (XSD) Documentation: Provides comprehensive information on the XSD format.
* Juniper Networks Documentation: Discusses the role of XML schemas in managing Junos configurations.
References:

QUESTION 37
Which statement is correct about Ansible playbooks?

 A playbook is a configuration file that defines the Ansible related parameters

 A playbook contains one or more tasks written in XML

 A playbook can contain multiple tasks and execute multiple Python modules

 A playbook is a specific Python module that is executed on a host

QUESTION 38
Which two Python packages use NETCONF to interact with Junos devices? (Choose two.)

 numpy

 jsnapy

 junos-eznc

 pyyaml

QUESTION 39
Which XML feature is used to ensure that elements defined in multiple schemas would be used in the same document without conflicts?

 Attributes

 Predicates

 Selectors

 Namespaces

QUESTION 40
As part of an application to manage network devices, you must query hundreds of network devices and return the unique set of IP prefixes by configured firewall filters. To accomplish this task you will require a mutable data type that contains unordered, unique elements.
Which Python data type will fulfill these requirements?

 tuples

 lists

 dictionaries

 sets

https://stackoverflow.com/questions/14193438/are-python-sets-mutable/14193582

QUESTION 41
Which statement is correct about DevOps?

 DevOps is a collection of strict guidelines that promotes the project completion over all other aspects.

 DevOps is meant to define and restrict the development and operations tools used for a project.

 DevOps is meant to unite the development, operations, and other teams to improve project collaborations.

 DevOps is a defined standard written and maintained by the IEEE standards group.

DevOps is a set of practices, tools, and cultural philosophies that aims to integrate and automate the processes between software development and IT operations teams. The primary goal of DevOps is to shorten the systems development life cycle and provide continuous delivery with high software quality.
Option C is correct because DevOps fundamentally focuses on breaking down the silos between development and operations teams, fostering a collaborative environment where these teams work together throughout the entire software lifecycle. This collaboration extends to other stakeholders, including quality assurance (QA), security, and more, to ensure that the product is continuously delivered and improved based on real-time feedback.
DevOps promotes a cultural shift where teams are no longer isolated but work together to share responsibilities, which leads to increased efficiency, faster problem resolution, and a more streamlined deployment process. This culture of collaboration is supported by various automation tools and practices such as Continuous Integration (CI), Continuous Deployment (CD), Infrastructure as Code (IaC), and automated testing.
Supporting References:
* Juniper Networks Automation and DevOps Documentation:This documentation emphasizes the importance of collaboration between development and operations teams to streamline processes and improve efficiency, aligning perfectly with the principles of DevOps.
* “The DevOps Handbook”by Gene Kim, Patrick Debois, John Willis, and Jez Humble: This book provides an in-depth look into how DevOps practices enhance collaboration and lead to faster, more reliable software delivery.
* IEEE and Industry Standards:While DevOps practices are widely adopted, they are not defined or maintained by IEEE or any other formal standards body, which is why option D is incorrect.

QUESTION 42
Which data construct is used to guarantee that element names and data values remain unique in an XML document?

 element

 schema definition

 namespace

 dictionary

In XML documents, anamespaceis the data construct used to ensure that element names and data values remain unique. Namespaces prevent naming conflicts by differentiating between elements or attributes that may have the same name but different meanings. This is particularly important in XML, where documents often incorporate elements from multiple sources.
* XML Namespaces: A namespace is a collection of names, identified by a URI reference, which is used to distinguish between elements that may have identical names but different definitions or origins. This helps avoid ambiguity in the document.
* How Namespaces Work: When a namespace is applied, each element or attribute in the XML document is associated with a prefix. This prefix, combined with the namespace URI, ensures that the element or attribute is uniquely identified, even if another element or attribute in the same document has the same local name but a different namespace.
* Schema Definition vs. Namespace: Although an XML schema definition (XSD) can define the structure and type constraints of an XML document, it does not guarantee uniqueness of element names across different XML documents. That role is fulfilled by namespaces.
* Practical Example:
Detailed Explanation:xml
Copy code
<root
xmlns:ns1=”http://www.example.com/ns1″
xmlns:ns2=”http://www.example.com/ns2″>
<ns1:item>Item in namespace 1</ns1:item>
<ns2:item>Item in namespace 2</ns2:item>
</root>
In this example, theitemelements are in different namespaces (ns1andns2), which keeps them unique even though they have the same name.
* Juniper Automation and DevOps Documentation: These practices highlight the importance of namespaces in XML documents to maintain the integrity and uniqueness of data, which is essential in automation scripts and configuration files.
* W3C XML Namespace Specification: The World Wide Web Consortium (W3C) standard for XML Namespaces defines how namespaces should be used to avoid name conflicts.
References:Namespaces are a crucial concept in XML, ensuring that data can be consistently managed and interpreted correctly, particularly in complex systems where multiple XML documents or schemas are involved.

QUESTION 43
Which two statements about Junos PyEZ RPC(s) are correct? (Choose two.)

 PyEZ RPCs return XML data

 PyEZ RPCs can be used to view only the interface configuration

 PyEZ RPCs can be used to view the active device configuration

 PyEZ RPCs return CSV data

QUESTION 44
Exhibit.

Referring to the exhibit, which XML XPath expression will only show the IP address XML elements?

 //address/name

 //name

 /name

 /address/name

https://www.w3schools.com/xml/xpath_syntax.asp

 Loading …

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