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PCPP1認定試験は、Pythonプログラミング言語の使用を推進する非営利団体であるPython Instituteによって提供され、グローバルに認められています。この試験は、データ型、制御構造、関数、モジュール、オブジェクト指向プログラミングなどのトピックを含む、Pythonプログラミングに関する個人の知識とスキルをテストするように設計されています。この試験には、多肢選択問題、コーディング演習、パフォーマンスベースのタスクが含まれています。
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Python Institute PCPP-32-101認定試験は、業界で高く評価されている世界的に認められた認定です。これは、Python開発者が自分のスキルと知識を実証する優れた方法であり、キャリアを進めるのに役立ちます。 PCPP1認定試験は、Pythonプログラミング業界で自分自身を確立しようとしている個人にとって優れた出発点であり、新しい機会を求めている開発者にとって貴重な資格です。
質問 # 65
Select a log that matches the following format:
'%(name)s[%(levelname)s][%(asctime)s] :%(message)s'
正解：D
解説：
The correct answer is C. The logging format string requires the logger name first, followed immediately by the log level in square brackets, then the timestamp in square brackets, followed by a colon and the message. The default value produced by %(asctime)s includes milliseconds separated by a comma, such as 2019-10-19 18:21:35,407. Option C exactly matches that structure: root is the logger name,
[CRITICAL] is the level name, [2019-10-19 18:21:35,407] is the timestamp, and Invalid argument is the message. Options B and D use colon separators instead of brackets, while option A omits the milliseconds required by the default asctime format.
質問 # 66
What is true about the unbind () method? (Select two answers.)
正解：B、D
解説：
Explanation
Option B is true because the unbind() method is invoked from within a widget's object 1.
Option D is true because the unbind() method needs the event name as an argument 1.
The unbind() method in Tkinter is used to remove a binding between an event and a function. It can be invoked from within a widget's object when a binding is no longer needed. The method requires the event name as an argument to remove the binding for that specific event. For example:
button = tk.Button(root, text="Click me")
button.bind("<Button-1>", callback_function) # bind left mouse click event to callback_function button.unbind("<Button-1>") # remove the binding for the left mouse click event
質問 # 67
What is true about type in the object-oriented programming sense?
正解：A
解説：
In Python, type is the built-in metaclass that serves as the base class for all new-style classes. All new-style classes in Python, including built-in types like int and str , are instances of the type metaclass and inherit from it.
質問 # 68
Which of the following values can be returnedby the messagebox. askquestion () method?
正解：D
解説：
Explanation
The messagebox.askquestion() method in Python's tkinter library displays a message box with a specified question and two response buttons labeled "Yes" and "No". It returns a string indicating which button was selected - either "yes" or "no".
This function is used to ask questions to the user that have only two options: YES or NO. It can be used to ask the user if they want to continue or if they want to submit something 1.
質問 # 69
Select the true statements about the connection-oriented and connectionless types of communication. (Select two answers.)
正解：C、D
解説：
A). In the context of TCP/IP networks, the communication side that initiates a connection is called the client, whereas the side that answers the client is called the server.
This statement is true because TCP/IP networks use a client-server model to establish connection-oriented communications. The client is the device or application that requests a service or resource from another device or application, which is called the server. The server responds to the client's request and provides the service or resource. For example, when you browse a website using a web browser, the browser acts as a client and sends a request to the web server that hosts the website. The web server acts as a server and sends back the requested web page to the browser 1 .
B). Connectionless communications are usually built on top of TCP.
This statement is false because TCP (Transmission Control Protocol) is a connection-oriented protocol that requires establishing and terminating a connection before and after sending data. Connectionless communications are usually built on top of UDP (User Datagram Protocol), which is a connectionless protocol that does not require any connection setup or teardown. UDP simply sends data packets to the destination without checking if they are received or not 2 .
C). Using walkie-talkies is an example of a connection-oriented communication.
This statement is false because using walkie-talkies is an example of a connectionless communication. Walkie- talkies do not establish a dedicated channel or connection between the sender and receiver before transmitting data. They simply broadcast data over a shared frequency without ensuring that the receiver is ready or available to receive it. The sender does not know if the receiver has received the data or not 3 .
D). A phone call is an example of a connection-oriented communication.
This statement is true because a phone call is an example of a connection-oriented communication. A phone call requires setting up a circuit or connection between the caller and callee before exchanging voice data. The caller and callee can hear each other's voice and know if they are connected or not. The phone call also requires terminating the connection when the conversation is over 4 .
References:
1 : https://www.techtarget.com/searchnetworking/definition/client-server 2 : https://www.javatpoint.com
/connection-oriented-vs-connectionless-service 3 : https://en.wikipedia.org/wiki/Walkie-talkie 4 : https://en.
wikipedia.org/wiki/Telephone_call
A is true because in the context of TCP/IP networks, the communication side that initiates a connection is called the client, and the side that answers the client is called the server. This is the basis for establishing a connection-oriented communication.
D is true because a phone call is an example of a connection-oriented communication. Like TCP/IP, a phone call establishes a connection between two devices (in this case, two phones) before communication can occur.
A is true because in the context of TCP/IP networks, the communication side that initiates a connection is called the client, and the side that answers the client is called the server. This is the basis for establishing a connection-oriented communication.
D is true because a phone call is an example of a connection-oriented communication. Like TCP/IP, a phone call establishes a connection between two devices (in this case, two phones) before communication can occur.
B is false because connectionless communications are usually built on top of UDP, not TCP. UDP is a connectionless protocol that does not establish a connection before sending data.
C is false because using walkie-talkies is an example of a connectionless communication. Walkie-talkies do not establish a connection before communication begins, and messages are simply broadcasted to all devices within range.
Here is a sample code in Python using the socket module to create a TCP server and client to demonstrate the connection-oriented communication:
Server-side code:
import socket
HOST = '127.0.0.1'
PORT = 8080
with socket. socket (socket.AF_INET, socket.SOCK_STREAM) as s:
s. bind ((HOST, PORT))
s. listen ()
conn, addr = s. accept ()
with conn:
print ( 'Connected by' , addr)
while True:
data = conn. recv ( 1024 )
if not data:
break
conn. sendall (data)
Client-side code:
import socket
HOST = '127.0.0.1'
PORT = 8080
with socket. socket (socket.AF_INET, socket.SOCK_STREAM) as s:
s. connect ((HOST, PORT))
s. sendall (b ' Hello, world ' )
data = s. recv ( 1024 )
print ( 'Received' , repr (data))
The server listens for incoming connections on port 8080, and when a connection is established, it prints the address of the client that has connected. The server then continuously receives data from the client and sends it back to the client until the connection is closed.
The client establishes a connection with the server and sends the message "Hello, world" encoded as bytes. It then waits for a response from the server and prints the data it receives.
質問 # 70
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