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無料JNCIA-DevOps JN0-223オフィシャル認証ガイドPDFをダウンロード
質問 # 17
Exhibit.
Referring to the exhibit, which statement about REST is correct?
- A. The device is configured to allow only two simultaneous REST connections.
- B. The device is configured to allow connections from the REST API Explorer
- C. The device is configured to allow HTTP connections on port 3030.
- D. The device is configured to allow HTTPS connections on port 3443.
正解：D
質問 # 18
Exhibit.
Referring to the exhibit, which XPath statement would retrieve the commit-user attribute in the candidate configuration?
- A. configuration/junos: commit-user
- B. configuration/@ junos: commit-user
- C. configuration/commit-user
- D. configuration:@ junos: commit-user
正解：D
解説：
.
質問 # 19
Exhibit
Referring to the exhibit, what is the output from the print(x) line?
- A. ['a', 'b', 'c']
- B. ['b', 'c']
- C. ['b', 'c', 'd']
- D. ['a', 'b']
正解：B
解説：
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']
>>>
質問 # 20
Which two statements are correct about Junose PyEZ Tables and Views? (Choose two.)
- A. The juniper_junos_table module enables the use of PyEZ Tables and Views.
- B. PyEZ Tables and Views are defined using CSV.
- C. PyEZ Tables and Views are defined using YAML.
- D. The Juniper_Junos_config module enables the use of PyEZ Tables and Views.
正解：C、D
質問 # 21
What are two examples of XPath operators? (Choose two.)
- A.
- B. IS
- C. @
- D. AND
正解：A、C
質問 # 22
Which two programming languages are used for Junos on-box scripting? (Choose two.)
- A. SLAX
- B. XSLT
- C. Perl
- D. Ruby
正解：A、B
解説：
Junos on-box scripting supports the following programming languages:
* SLAX (C): SLAX (Structured Language for XML) is a scripting language designed specifically for Junos devices. It allows for easy manipulation of XML data, making it ideal for creating Junos scripts that interact with device configurations.
* XSLT (D): XSLT (Extensible Stylesheet Language Transformations) is another language used for transforming XML documents into other formats. It is commonly used in Junos for transforming XML data into different views or outputs.
Options A (Perl) and B (Ruby) are not used for Junos on-box scripting.While these languages are popular in other contexts, Junos scripting relies heavily on XML-based languages like SLAX and XSLT.
* Junos XML API and Scripting Guide: Describes the use of SLAX and XSLT for on-box scripting.
* Juniper Networks Automation Documentation: Provides examples and best practices for using SLAX and XSLT in Junos scripting.
References:
質問 # 23
Exhibit.
Which command will solve the problem......
- A. ansible-galaxy install..
- B. ansible-galaxy install ..
- C. pip install-eznc..
- D. pip install Juniper, junos..
正解：B
質問 # 24
Which feature is used in XML to ensure that all attributes and elements have unique names?
- A. predicate
- B. XPath
- C. namespace
- D. selectors
正解：B
質問 # 25
What are two Junos PyEZ configuration object methods? (Choose two.)
- A. config ()
- B. lockO
- C. commie ()
- D. device ()
正解：A、B
解説：
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().
質問 # 26
Which cur1 command will successfully retrieve interface information from a Juniper device?
- A. cur1 -''lab:lab123'' http://10.200.1.1:3443/rpc/get-interface-information -X POST
- B. cur1 -''lab:lab123'' http://10.200.1.1:3000/rpc/get-interface-information -X GET
- C. cur1 -''lab:lab123'' http://10.200.1.1:8443/rpc/get-interface-information -X GET
- D. cur1 -''lab:lab123'' http://10.200.1.1:3443/rpc/get-interface-information -X POST
正解：A
質問 # 27
Which two processes are used by Junos automation? (Choose two.)
- A. kmd
- B. jsd
- C. ifd
- D. mod
正解：A、B
解説：
Junos automation relies on several key processes to handle various automation and API interactions. Let's break down the two key processes involved:
* jsd (Junos Script Daemon):The jsd process is responsible for handling automation scripts, including Python and SLAX scripts, as well as handling JET (Junos Extension Toolkit) API requests. This process is fundamental in the automation framework of Junos, as it deals with external and internal API requests, ensuring that the necessary scripts are executed when specific triggers or events occur.
* kmd (Key Management Daemon):The kmd process is involved in key management for IPsec and other security services. While its primary function is related to managing cryptographic keys, it plays a role in Junos automation by enabling secure communication and ensuring that automation tasks involving security services (such as automated IPsec tunnel creation) are handled securely.
Why the Other Options Are Incorrect:
* A. mod:This process doesn't exist as part of the Junos automation framework. It's likely a distractor.
* C. ifd:The ifd process is associated with the physical interfaces on the device and does not play a role in automation or script processing.
References from Juniper Documentation:
* Junos Automation Processes
質問 # 28
Prior to creating a Junos automation script, you want to understand the output format of a new isolated RPC calls to use in the script.
What is the provided on Junos devices to help accomplish this task?
- A. REST API Explorer
- B. PyEZ
- C. NETCONF
- D. RPC on Demand
正解：A
質問 # 29
Exhibit.
In the XML output shown in the exhibit. what is the full XPath for the IP address of the interface?
- A.
- B.
- C.
- D.
正解：A
質問 # 30
Exhibit.
Which type of file is shown in the exhibit?
- A. Ansible playbook
- B. Puppet manifest
- C. XSLT file
- D. XML file
正解：A
質問 # 31
Exhibit.
Referring to the exhibit, which XPath statement would retrieve the commit-user attribute in the candidate configuration?
- A. configuration/junos: commit-user
- B. configuration/@ junos: commit-user
- C. configuration/commit-user
- D. configuration:@ junos: commit-user
正解：D
質問 # 32
Which DevOps "Three way" principle addresses technical debt?
- A. continuous experimentation
- B. continuous experimentation and learning
- C. feedback
- D. flow
正解：C
解説：
In the context of the DevOps "Three Ways" principles, thefeedbackprinciple directly addresses the management of technical debt.
The "Three Ways" are core principles guiding DevOps practices, and they are as follows:
* Flow:Refers to the smooth and fast flow of work through the system, from development to operations.
* Feedback:Emphasizes creating effective, fast, and continuous feedback loops between teams to catch issues early, address technical debt, and ensure quality.
* Continuous experimentation and learning:Encourages constant experimentation, innovation, and learning from failures to improve systems and processes over time.
Feedback and Technical Debt:
* Feedbackloops play a crucial role in addressing technical debt. Technical debt refers to the implied cost of additional work that arises when code or system design decisions are made for short-term gains, such as quick fixes or temporary patches. Over time, technical debt can accumulate and degrade system performance, reliability, and maintainability.
* Thefeedback loopensures that issues related to technical debt (such as poor code quality, design shortcuts, or performance bottlenecks) are caught early in the process, ideally before they become major problems. Continuous monitoring, testing, and reviewing help identify and resolve technical debt incrementally rather than letting it accumulate unchecked.
* Automation in feedback loops: In DevOps, automated testing, continuous integration (CI), and monitoring tools provide immediate feedback to developers, highlighting areas where technical debt is increasing. This feedback is crucial for making proactive decisions about refactoring code or improving infrastructure without waiting for problems to manifest in production.
* For instance, the feedback loop might expose slowdowns in application performance after each new feature is added. This would trigger a review to either refactor the feature code or improve system resources, preventing further technical debt accumulation.
Flow and Technical Debt:
* Whileflowfocuses on the smooth transition of work through the pipeline, it indirectly helps with technical debt by ensuring continuous and streamlined processes. However, feedback mechanisms are the primary tools for identifying and resolving technical debt.
Continuous Experimentation and Learning:
* This principle promotes innovation and learning from failures but does not directly address technical debt. The focus here is more on risk-taking and improvement rather than managing or eliminating technical debt.
References from DevOps Practices:
* The Phoenix Project, a book often referenced in DevOps, discusses how feedback loops are essential for maintaining system integrity and managing technical debt effectively. By improving feedback mechanisms, teams can address small issues before they become costly to fix.
* The DevOps Handbookalso highlights the importance of feedback in managing technical debt, emphasizing that fast feedback allows for continuous improvement and avoids the accumulation of bad practices that would otherwise lead to technical debt.
Juniper Automation and DevOps Context:Juniper's automation frameworks integrate feedback mechanisms using tools like continuous monitoring and automated testing. These tools help engineers track the health of network systems, identify configuration drifts, and resolve issues before they lead to significant technical debt.
Additional Resources:
* The Phoenix Project by Gene Kim
* The DevOps Handbook
質問 # 33
Exhibit.
Which type of data maps to the position key shown in the exhibit?
- A. position
- B. Boolean
- C. string
- D. integer
正解：A
質問 # 34
Which two standard logical operators does XPath support? (Choose two.)
- A. IOR
- B. MAMD
- C. NOT
- D. AND
正解：C、D
解説：
XPath is a query language used for selecting nodes from an XML document. It supports various logical operators that can be used to create complex queries. The two standard logical operators supported by XPath are:
* NOT:This operator negates a condition, returningtrueif the condition is false, and vice versa.
* AND:This operator is used to combine two conditions, and it returnstrueonly if both conditions are true.
* Option A (IOR)andOption D (MAMD)are not standard XPath operators.
Supporting References:
* XPath Documentation:The W3C XPath specification lists the standard operators supported in XPath, includingANDandNOT.
質問 # 35
Referring to the exhibit.
which two statements are correct? (Choose two.)
- A. The configuration will be retrieved in XML format.
- B. The retrieved configuration will be from the Junos active configuration.
- C. The configuration will be retrieved in JSON format.
- D. The retrieved configuration will be from the Junos candidate configuration.
正解：C、D
質問 # 36
Which two statements about the Junos PyEZ configuration module are correct? (Choose two )
- A. The lock() method can be used to lock the configuration database.
- B. PyEZ does not support performing an exclusive lock on the configuration database.
- C. The configuration module does not support loading a rescue configuration
- D. The configuration module supports loading a rescue configuration
正解：A、D
質問 # 37
Which Ansible module would be used to obtain basic information about a Junos device?
- A. juniper_junos_rpc
- B. juniper_junos_info
- C. juniper_junos_facts
- D. juniper_junos_config
正解：C
質問 # 38
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Juniper JN0-223オフィシャル認証ガイドPDF：https://www.passtest.jp/Juniper/JN0-223-shiken.html
試験JN0-223のAutomation and DevOps, Associate (JNCIA-DevOps)の問題集にはここにある：https://drive.google.com/open?id=1QB-_Tofj3uEskjH-FPd2LQqwuVXyJQk0