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完全版JN0-223練習テスト66別格な問題と解釈が待ってます。今すぐゲット！
質問 # 34
Which statement is correct about Ansible playbooks?
- A. A playbook is a specific Python module that is executed on a host
- B. A playbook contains one or more tasks written in XML
- C. A playbook is a configuration file that defines the Ansible related parameters
- D. A playbook can contain multiple tasks and execute multiple Python modules
正解：D
質問 # 35
Exhibit.
You have the configuration shown in the exhibit, but are unable to access the REST API Explorer.
Which configuration is necessary to solve this problem?
- A. Configure the rest service to be active on port 80.
- B. Configure a secondary IPv6 address on ge-0/0/0.0.
- C. Configure an IPv4 address on ge-0/0/0 0.
- D. Configure a firewall filter to explicitly permit SSH.
正解：B
質問 # 36
Which two tools would you use to make REST API requests? (Choose two.)
- A. Web browser
- B. NETCOfJF
- C. SSH
- D. cURL
正解：A、D
解説：
REST API requests can be made using various tools that support HTTP methods. Two common tools are:
* cURL:A command-line tool that allows you to send HTTP requests, including GET, POST, PUT, and DELETE. It is widely used for testing and interacting with RESTful APIs due to its simplicity and flexibility.
* Web Browser:Modern web browsers can be used to send HTTP GET requests directly by entering the URL into the address bar. Additionally, browser extensions like Postman or built-in developer tools can be used to construct and send more complex REST API requests.
* Option B (NETCOfJF)is incorrect as it does not refer to a standard tool for making REST API requests.
* Option D (SSH)is incorrect because SSH is a protocol used for secure remote login and command execution, not for sending REST API requests.
Supporting References:
* cURL Documentation:Official cURL documentation provides extensive information on how to use cURL to interact with REST APIs.
* Web Development and REST API Guides:Many web development resources and REST API documentation recommend using web browsers and tools like cURL for testing and interacting with APIs.
質問 # 37
What are two components of the Waterfall model of software development? (Choose two.)
- A. a large volume of code changes between releases
- B. a long interval of time between releases
- C. a short interval of time between releases
- D. a small volume of code changes between releases
正解：A、B
質問 # 38
Exhibit.
Referring to the exhibit, which two code blocks are an equivalent representation in JSON? (Choose two.)
- A. {"Routers":["r1","r2"],"Switches":[{"s1":[{"interface":"ge-0/0/0.0"}]}]}
- B.
- C. {"routers":["r1","r2"],"switches":[{"s1":[{"interface":"ge-0/0/0.0"}]}]}
- D.
正解：B、C
質問 # 39
Which HTTP status code indicates a response to a successful request?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
Reference: https://www.juniper.net/documentation/en_US/junos-space-sdk/13.1/apiref/ com.juniper.junos_space.sdk.help/html/reference/Commonbehav.html
質問 # 40
You are using the curl tool to include multiple RPCs in a REST API request.
Which HTTP method must be used for this request?
- A. PUT
- B. HEAD
- C. GET
- D. POST
正解：D
質問 # 41
Which statement is correct about DevOps?
- A. DevOps is meant to unite the development, operations, and other teams to improve project collaborations.
- B. DevOps is a collection of strict guidelines that promotes the project completion over all other aspects.
- C. DevOps is meant to define and restrict the development and operations tools used for a project.
- D. DevOps is a defined standard written and maintained by the IEEE standards group.
正解：A
解説：
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.
質問 # 42
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 the number of simultaneous connections.
- B. Limit management access to only SSH
- C. Limit access to only certain source IP addresses
- D. Limit management access to specific users.
正解：A、C
解説：
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.
質問 # 43
Exhibit.
Referring to the exhibit, what is the correct method to retrieve the value associated only with
''MX960''?
- A. hardware_count.keys ()
- B. harware_count [''MX960'']
- C. hardware_count (0)
- D. hardware_count. value ()
正解：A
質問 # 44
Which two statements about NETCONF are true? (Choose two.)
- A. It uses the operations layer to lock the configuration of a Junos device.
- B. It uses the messages layer to lock the configuration of a Junos device.
- C. It uses the messages layer to commit the configuration of a Junos device.
- D. It uses the operations layer to commit the configuration of a Junos device.
正解：A、D
解説：
NETCONF (Network Configuration Protocol) operates through different layers, with the operations layer being particularly important for managing configurations:
* Operations Layer (A & D): This layer is responsible for actions like locking and committing the configuration on a Junos device. The lock operation prevents other sessions from modifying the configuration, and the commit operation applies the configuration changes to the device.
Options B and Care incorrect because the messages layer handles the communication aspects, such as exchanging data between the client and server, not performing configuration operations like locking and committing.
* IETF RFC 6241 (NETCONF): Describes the protocol layers and their functions, with a focus on the operations layer.
* Juniper Networks NETCONF Documentation: Provides insights into how NETCONF operations are managed in Junos References:
質問 # 45
Which character is used to show the start of parameters in a REST API call?
- A. ?
- B. &
- C. #
- D. =
正解：B
質問 # 46
You want to make a list in Python to store data.
Which statement is the correct way to accomplish this task?
- A. L = [0, 1, 2, 3, 4, 5]
- B. L = {0, 1, 2, 3, 4, 5}
- C. L = (0, 1, 2, 3, 4, 5)
- D. L = "0, 1, 2, 3, 4, 5"
正解：A
解説：
In Python, to create a list, you use square brackets[]. The correct syntax to create a list containing the numbers
0 through 5 is:
* L = [0, 1, 2, 3, 4, 5]
This statement creates a list object that stores the specified integers.
Other options are incorrect:
* Adefines a string, not a list.
* Bdefines a set, which is an unordered collection with no duplicate elements.
* Ddefines a tuple, which is an immutable sequence, not a list.
* Python Official Documentation: Discusses lists, sets, tuples, and their syntaxes.
* Python Data Structures Guide: Provides examples of creating and manipulating lists.
References:
質問 # 47
Which two Python packages use NETCONF to interact with Junos devices? (Choose two.)
- A. junos-eznc
- B. pyyaml
- C. jsnapy
- D. numpy
正解：A、C
質問 # 48
Which two statements about Ansible are true? (Choose two.)
- A. By default, Ansible playbooks are executed locally.
- B. Ansible modules only execute a change if required -
- C. By default, Ansible core modules use NETCONF to connect to the remote host.
- D. Ansible uses an agentless architecture.
正解：C、D
解説：
Reference: https://www.juniper.net/documentation/en_US/junos-ansible/topics/concept/junos- ansibleoverview.html#:~:text=Ansible%20uses%20an%20agentless%20architecture,software%20on
%20the%20managed%20nodes.&text=Thus%2C%20Ansible%20users%20can%20get,of%20Python%
20to%20use% 20Ansible
質問 # 49
Exhibit.
Referring to the exhibit, this snippet of code would represent which type of data?
- A. JSON object
- B. JSON array
- C. YAML sequence
- D. YAML mapping
正解：A
解説：
Reference: https://www.juniper.net/documentation/en_US/junos-salt/topics/topic-map/junos-salt- configurationloading-commiting.html
質問 # 50
What is the correct sequence for Python script execution?
- A. The code is translated to byte code, the byte code is executed in runtime, and then the code is interpreted.
- B. The byte code is executed in runtime, the code is interpreted, and then the code is translated to byte code.
- C. The code is interpreted, the code is translated to byte code, and then the byte code is executed in runtime.
- D. The code is translated to byte code, the code is interpreted, and then the byte code is executed in runtime.
正解：C
解説：
Python follows a specific execution flow when a script is run:
* The code is interpreted:Python is an interpreted language, meaning that the Python interpreter reads the code line by line. When a Python script is executed, the interpreter first reads the source code.
* The code is translated to bytecode:After interpreting the source code, Python translates it into bytecode. Bytecode is an intermediate representation of the source code that is portable and efficient for execution by the Python Virtual Machine (PVM).
* The bytecode is executed in runtime:Finally, thePython Virtual Machine (PVM)executes the bytecode. The PVM is a part of the Python runtime environment, responsible for interpreting the bytecode into machine-specific instructions for execution.
Hence, the correct sequence is:interpreted # translated to bytecode # bytecode executed in runtime.
Why the Other Options Are Incorrect:
* Options A, C, and D present an incorrect order of the script execution process, especially in how bytecode is generated and executed.
References:
* Python's documentation on the interpreter and its execution model explains this standard process.
質問 # 51
What are two important aspects of the DevOps culture? (Choose two.)
- A. separation of duties
- B. use of specific tools
- C. people
- D. communication
正解：C、D
解説：
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:
質問 # 52
What is a valid JSON object?
- A. { ''vmx-1: 172.25.11.1''}
- B. ''hostname:vmx-1''
- C. { ''hostname'' : ''vmx-1''}
- D. { ''vmx-1'', ''172.25.11.1''}
正解：C
質問 # 53
You are asked to gather interface information from a Junos device. Your environment supports the JSON format. To determine how interface information is represented, you decide to view all of the configured interface key-value pairs in the current Junos candidate configuration.
In this scenario, which command will provide the information that you need?
- A. user@router# show interfaces | display json
- B. user@router# show interfaces | except json
- C. user@router# show interfaces | find json
- D. user@router# show interfaces | match json
正解：A
質問 # 54
Exhibit.
Referring to the exhibit, which two statements are correct? (Choose two)
- A. The Junos configuration database is automatically locked and unlocked.
- B. The Junos configuration database is explicitly locked and unlocked
- C. The connection to the Junos device is explicitly opened and closed
- D. The connection to the Junos device is automatically opened and closed
正解：A、B
質問 # 55
Which two statements about NETCONF are correct? (Choose two.)
- A. NETCONF can use the default SSH port.
- B. The default port for NETCONF is port 930.
- C. The default port for NETCONF is port 830.
- D. NETCONF cannot use the default SSH port.
正解：A、C
解説：
NETCONF (Network Configuration Protocol) is used for network device management and can operate over SSH. The following are true about NETCONF:
* Default Port 830 (B): By default, NETCONF uses port 830 for communication over SSH. This is the standard port reserved for NETCONF sessions.
* Use of Default SSH Port (D): NETCONF can also operate over the standard SSH port (port 22) if configured to do so. This allows flexibility in network management scenarios where port 830 might not be available or used.
Options A and C are incorrectbecause they refer to incorrect or non-applicable port numbers for NETCONF.
* IETF RFC 6241: Specifies the use of NETCONF over SSH, including port details.
* Juniper Networks NETCONF Documentation: Discusses the configuration and operation of NETCONF on Junos devices, including port usage.
References:
質問 # 56
Which process is responsible for XML automation requests?
- A. jsd
- B. mgd
- C. jsrpd
- D. rpd
正解：B
解説：
Themgd(Management Daemon) process in Junos is responsible for handling XML automation requests. This daemon manages the configuration and operational commands received via NETCONF, which uses XML for data exchange. Themgdprocess parses the XML data and applies the necessary configuration or retrieves the requested information.
* Option Bis correct becausemgdis the process that handles XML-based requests in Junos.
* Options A (jsrpd), C (rpd), and D (jsd)are incorrect because they are responsible for different functions, such as routing protocols and services, not XML automation.
Supporting References:
* Juniper Networks Management Daemon (mgd) Documentation:Provides an overview of the responsibilities of themgdprocess, including handling XML requests.
質問 # 57
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