JNCIA-DevOps JN0-223リアル試験問題と無料最新回答2025年04月02日
JN0-223究極な学習ガイド
JN0-223認定試験は、ネットワークオートメーションとDevOpsでのキャリアを追求することに興味がある専門家にとって貴重な資格です。この試験に合格することにより、個人はジュニパーネットワークの自動化ツールとプロセスの習熟度を実証し、競争力のある雇用市場で自分自身を差別化することができます。
質問 # 10
Which two statements about Junos automation are correct? (Choose two.)
- A. Junos automation allows for device provisioning through the console port.
- B. The Junos REST API client is on-box.
- C. The Junos REST API client is off-box.
- D. Junos automation does not allow for device provisioning throuqh the console port.
正解：A、B
質問 # 11
A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)
- A. POST
- B. CONNECT
- C. GET
- D. HEAD
正解：A、C
解説：
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.
質問 # 12
Which process is responsible for XML automation requests?
- A. rpd
- B. mgd
- C. jsd
- D. jsrpd
正解：B
解説：
The mgd (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. The mgd process parses the XML data and applies the necessary configuration or retrieves the requested information.
Option B is correct because mgd is 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 Reference:
Juniper Networks Management Daemon (mgd) Documentation: Provides an overview of the responsibilities of the mgd process, including handling XML requests.
質問 # 13
Which two statements are correct about a Python list data type? (Choose two.)
- A. The data contained in a list data type cannot be modified.
- B. The data contained in a list data type can be modified.
- C. The data contained in a list data type is not sequenced or indexed.
- D. The data contained in a list data type is sequenced and indexed starting from 0.
正解：B、D
解説：
Python lists have the following characteristics:
Modifiable Data (A): Lists are mutable, meaning you can change, add, or remove elements after the list has been created.
Sequenced and Indexed (B): Lists maintain the order of their elements and are indexed starting from 0. This means you can access elements by their position in the list.
Option C is incorrect because lists are mutable, allowing modifications. Option D is incorrect because lists are indeed sequenced and indexed, unlike dictionaries.
Reference:
Python Official Documentation: Covers the properties of lists, including mutability and indexing.
Python Data Structures Guide: Explains list operations and how to manipulate them.
質問 # 14
Which two PyEZ object methods are included by default when using a Python context manager? (Choose two.)
- A. pdiff() and diff()
- B. open() and close()
- C. |load() and commit ()
- D. lock () and unlock (>
正解：B、D
解説：
When using a Python context manager with Junos PyEZ, two key methods are automatically included:
open() and close(): These methods are used to establish and terminate a connection to a Junos device. When you use a context manager (the with statement), open() is called when entering the block, and close() is called when exiting, ensuring the connection is properly managed.
lock() and unlock(): These methods are used to lock the configuration database to prevent other users from making changes while you are working on it. When using a context manager, lock() is called at the start of the block, and unlock() is called at the end, ensuring safe configuration changes.
Supporting Reference:
Junos PyEZ Documentation: The documentation explains how context managers work in PyEZ, including the automatic invocation of open(), close(), lock(), and unlock() methods.
質問 # 15
Which two tools would you use to make REST API requests? (Choose two.)
- A. Web browser
- B. SSH
- C. cURL
- D. NETCOfJF
正解：A、C
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 # 16
Which two statements about Python lists are correct? (Choose two.)
- A. Lists must contain only elements of the same data type.
- B. Lists contain a countable number of ordered values
- C. Lists can contain elements of multiple data types.
- D. Lists contain a countable number of unordered values.
正解：B、C
質問 # 17
Which two statements are correct about a Python dictionary data type? (Choose two.)
- A. The data contained in a dictionary data type cannot be removed once the dictionary has been created.
- B. The data contained in a dictionary data type is a key/value pair.
- C. The data stored in a dictionary data type is sequenced and indexed.
- D. The data stored in a dictionary data type is not sequenced or indexed.
正解：B、D
解説：
A Python dictionary is a data type that stores data in the form of key/value pairs. It has the following characteristics:
* Key/Value Pair (C): Each entry in a dictionary is a pair consisting of a unique key and a value. The key is used to access the corresponding value.
* Not Sequenced or Indexed (D): Unlike lists or tuples, dictionaries do not maintain order for their entries (in versions prior to Python 3.7). Even though Python 3.7+ maintains insertion order, dictionaries are not considered indexed or sequenced in the traditional sense like lists, where elements are accessed via positional index.
Option A is incorrectbecause dictionary entries can be added, modified, or removed after the dictionary is created.Option B is incorrectbecause dictionaries are not accessed by a numeric index but rather by their keys.
* Python Official Documentation: Details the nature of dictionaries, including their mutability and key
/value structure.
* Python Data Structures Guide: Explains dictionary operations and characteristics.
References:
質問 # 18
Which two statements about the Junos PyEZ configuration module are correct? (Choose two )
- A. PyEZ does not support performing an exclusive lock on the configuration database.
- B. The configuration module supports loading a rescue configuration
- C. The configuration module does not support loading a rescue configuration
- D. The lock() method can be used to lock the configuration database.
正解：B、D
質問 # 19
Exhibit.
Referring to the exhibit, which two statements about the script are correct? (Choose two.)
- A. The script retrieves the interface configuration in JSON.
- B. The script retrieves the interface configuration in XML
- C. The script prints the name of each configured interface.
- D. The script prints interface information for each interface name.
正解：A、C
質問 # 20
You need an Ansible Playbook to log in to multiple devices with different login credentials. For compliance purposes, you are not allowed to prompt the user for the credentials or allow the credentials be stored in planted on the control machine for each device.
Which two actions will fulfill this task? (Choose two.)
- A. Define the credentials in a vaulted file.
- B. Define the credentials as variables in the host's file
- C. Define the generated SSH keys to use in the playbook on the devices.
- D. Define the credentials as variables in the playbook.
正解：A、C
質問 # 21
Which two Junos processes handle automation on Junos devices? (Choose two.)
- A. rpd
- B. mgd
- C. jsd
- D. chassid
正解：B
質問 # 22
Which Ansible module would be used to obtain basic information about a Junos device?
- A. juniper_junos_rpc
- B. juniper_junos_config
- C. juniper_junos_info
- D. juniper_junos_facts
正解：D
質問 # 23
Junos PyEZ tables are formatted using which file type?
- A. IXML
- B. txt
- C. SON
- D. YAML
正解：D
解説：
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 Reference:
Junos PyEZ Tables Documentation: Explains the use of YAML files for formatting tables and views in Junos PyEZ.
質問 # 24
Ansible playbooks are written in which format?
- A. XML
- B. JSON
- C. Python
- D. YAML
正解：D
解説：
Ansible Playbooks are written in YAML
質問 # 25
Exhibit.
Referring to the exhibit, which statement about the Ansible Playbook is correct?
- A. The Ansible Playbook execution will fail
- B. The Ansible Playbook will prompt for credentials
- C. The Ansible Playbook will report a syntax error
- D. The Ansible Playbook will execute successfully
正解：D
質問 # 26
Which two statements about the REST API are correct? (Choose two.)
- A. The REST API application is stateless.
- B. The REST API application is stateful.
- C. The TCP session state is maintained by the client
- D. The TCP session state is maintained by the server.
正解：A、C
解説：
REST (Representational State Transfer) is an architectural style for designing networked applications, and its key principles include:
Statelessness (B): Each request from the client to the server must contain all the information needed to understand and process the request. The server does not store any session state between requests, meaning each request is independent and does not rely on previous ones.
TCP Session State (C): While REST itself is stateless, the underlying TCP connection's state, such as keeping the connection alive or managing retries, is handled by the client. The server does not retain information about the TCP connection beyond the processing of the individual request.
Options A and D are incorrect because they imply that the REST API is stateful, which contradicts the stateless nature of REST.
Reference:
REST API Design Principles: Describes the stateless nature of REST and the responsibility of clients in managing session state.
Web Development Documentation: Discusses how REST APIs operate, focusing on statelessness and client-server interaction.
質問 # 27
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 # 28
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