QUESTION: 17

What is the correct Python script syntax to prompt for input?

hostIP = input("Device IP address: ")
hostIP = input{Device IP address: }
hostIP = input"Device IP address: "
input("Device IP address: ") = hostIP

Answer(s): A

Explanation:

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

input(prompt): The input() 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 variable hostIP.

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

Reference:

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

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

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QUESTION: 18

Given the following Python script:

a = [1,2,3,4,5,6,7,8,9]

print(a[0])

What is the output of this print command?

Answer(s): A

Explanation:

In Python, lists are zero-indexed, meaning the first element of the list is at index 0. The given script is:

pythona = [1, 2, 3, 4, 5, 6, 7, 8, 9]

print(a[0])

a[0] refers to the first element in the list a, which is 1.

So, the output of the print(a[0]) command is 1.

Option A is correct because Python indexing starts at 0, making the first element of the list at index 0.

Reference:

Python Official Documentation: Covers list indexing and operations.

Python Programming Tutorials: Provide examples of list indexing.

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QUESTION: 19

Which Junos API supports direct modification of the Ephemeral database?

JET
WebSocket
SOAP
REST

Answer(s): A

Explanation:

In Junos, the JET (Junos Extension Toolkit) API supports direct modification of the Ephemeral database. The Ephemeral database is a temporary configuration database used in Junos OS, allowing for changes that do not persist after a reboot unless explicitly committed to the permanent configuration.

JET API: Allows for high-performance interactions with Junos, including the ability to make changes to the Ephemeral database, which is useful for temporary configurations, dynamic policies, and other operational tasks.

Other options like WebSocket, SOAP, and REST do not provide direct access to the Ephemeral database in Junos.

Reference:

Juniper Networks JET Documentation: Details how JET API interacts with the Ephemeral database.

Junos Automation and DevOps Documentation: Discusses the use of JET for automation and dynamic configuration.

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QUESTION: 20

Which two statements about the REST API are correct? (Choose two.)

The TCP session state is maintained by the server.
The REST API application is stateless.
The TCP session state is maintained by the client
The REST API application is stateful.

Answer(s): B,C

Explanation:

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.

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Free JN0-223 Exam Braindumps (page: 5)

QUESTION: 17

Explanation:

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QUESTION: 18

Explanation:

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QUESTION: 19

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QUESTION: 20

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