PCPP-32-101 Prüfungsinformationen - PCPP-32-101 Zertifizierungsfragen

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Python Institute PCPP-32-101 Exam Syllabus Topics:

Section	Weight	Objectives
File Processing and Serialization	15%	- Data storage and transfer 1. JSON processing 2. Pickle serialization 3. Persistent data management 4. CSV handling
Network Programming	20%	- Communication and networking 1. Network services 2. Socket programming 3. Protocols and data exchange 4. Client-server communication
Advanced Object-Oriented Programming	25%	- Object-oriented concepts 1. Class and instance attributes 2. Method overriding and extension 3. Encapsulation and abstraction 4. Inheritance and polymorphism
GUI Programming	20%	- Graphical user interfaces with Tkinter 1. Application structure 2. Widgets and layouts 3. User interaction 4. Event handling
Multithreading and Concurrency	10%	- Concurrent programming 1. Concurrency considerations 2. Synchronization mechanisms 3. Thread communication 4. Thread creation and management
Python Standard Library and Best Practices	10%	- Advanced Python development 1. Code organization 2. Using standard library modules 3. Professional programming practices 4. Error handling and debugging

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PCPP-32-101 Zertifizierungsfragen & PCPP-32-101 Ausbildungsressourcen

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Python Institute PCPP1 - Certified Professional in Python Programming 1 PCPP-32-101 Prüfungsfragen mit Lösungen (Q60-Q65):

60. Frage
Analyze the following function and choose the statement that best describes it.

A. The function is erroneous.
B. It is an example of a decorator that accepts its own arguments.
C. It is an example of a decorator that can trigger an infinite recursion.
D. It is an example of decorator stacking.

Antwort: B

Begründung:
In the given code snippet, the repeat function is a decorator that takes an argument num_times specifying the number of times the decorated function should be called. The repeat function returns an inner function wrapper_repeat that takes a function func as an argument and returns another inner function wrapper that calls func num_times times.
The provided code snippet represents an example of a decorator that accepts its own arguments.
The @decorator_function syntax is used to apply the decorator_function to the some_function function.
The decorator_function takes an argument arg1 and defines an inner function wrapper_function that takes the original function func as its argument. The wrapper_function then returns the result of calling func , along with the arg1 argument passed to the decorator_function .
Here is an example of how to use this decorator with some_function :
@ decorator_function ( "argument 1" )
def some_function ():
return "Hello world"
When some_function is called, it will first be passed as an argument to the decorator_function .
The decorator_function then adds the string "argument 1" to the result of calling some_function() and returns the resulting string. In this case, the final output would be "Hello world argument 1" .
Reference:
Official Python documentation on Decorators: https://docs.python.org/3/glossary.html#term-decorator

61. Frage
Analyze the following snippet and select the statement that best describes it.

A. The code is missing a placeholder for unnamed parameters.
B. The code is syntactically incorrect - the function should be defined as def f1 (*args, **kwargs)
C. The code is syntactically correct despite the fact that the names of the function parameters do not follow the naming convention
D. The *arg parameter holds a list of unnamed parameters

Antwort: D

Begründung:
Explanation
The provided code snippet defines a function f1 that accepts variable-length arguments using the *args and **kwargs syntax. The *args parameter allows for an arbitrary number of unnamed arguments to be passed to the function as a tuple, while the **kwargs parameter allows for an arbitrary number of named arguments to be passed to the function as a dictionary.
Therefore, the correct statement that best describes the code is:
The *args parameter holds a list of unnamed parameters, while the **kwargs parameter holds a dictionary of named parameters.

62. Frage
Select the true statements about sockets. (Select two answers)

A. A socket is always the secure means by which computers on a network can safely communicate, without the risk of exposure to an attack
B. A socket is a connection point that enables a one-way communication only between remote processes
C. A socket is a connection point that enables a two-way communication between programs running in a network.
D. A socket can be used to establish a communication endpoint for processes running on the same or different machines.

Antwort: C,D

Begründung:
Explanation
A socket is a connection point that enables a two-way communication between programs running in a network.
This statement is true because a socket is a software structure that serves as an endpoint for sending and receiving data across a network. A socket is defined by an application programming interface (API) for the networking architecture, such as TCP/IP. A socket can be used to establish a communication channel between two programs running on the same or different network nodes12.
A socket is always the secure means by which computers on a network can safely communicate, without the risk of exposure to an attack.
This statement is false because a socket by itself does not provide any security or encryption for the data transmitted over the network. A socket can be vulnerable to various types of attacks, such as eavesdropping, spoofing, hijacking, or denial-of-service. To ensure secure communication, a socket can use additional protocols or mechanisms, such as SSL/TLS, SSH, VPN, or firewall3.
A socket is a connection point that enables a one-way communication only between remote processes.
This statement is false because a socket can enable both one-way and two-way communication between processes running on the same or different network nodes. A socket can be used for connection-oriented or connectionless communication, depending on the type of protocol used. For example, TCP is a connection-oriented protocol that provides reliable and bidirectional data transfer, while UDP is a connectionless protocol that provides unreliable and unidirectional data transfer12.
A socket can be used to establish a communication endpoint for processes running on the same or different machines.
This statement is true because a socket can be used for inter-process communication (IPC) within a single machine or across different machines on a network. A socket can use different types of addresses to identify the processes involved in the communication, such as IP address and port number for network sockets, or file name or path for Unix domain sockets12.
References:
1: https://en.wikipedia.org/wiki/Network_socket 2:
https://www.geeksforgeeks.org/socket-in-computer-network/ 3:
https://www.tutorialspoint.com/what-is-a-network-socket-computer-networks

63. Frage
If w is a correctly created main application window, which method would you use to foe both of the main window's dimensions?

A. w. f ixshape ()
B. w.makewindow ()
C. w. f ixdim ()
D. w. resizable ()

Antwort: D

Begründung:
C). w.resizable()
The resizable() method takes two Boolean arguments, width and height , that specify whether the main window can be resized in the corresponding directions. Passing False to both arguments makes the main window non-resizable, whereas passing True to both arguments (or omitting them) makes the window resizable.
Here is an example that sets the dimensions of the main window to 500x400 pixels and makes it non-resizable:
import tkinter as tk
root = tk. Tk ()
root. geometry ( "500x400" )
root. resizable (False, False)
root. mainloop ()
References:
Tkinter documentation: https://docs.python.org/3/library/tk.html
Tkinter tutorial: https://www.python-course.eu/python_tkinter.php
The resizable () method of a tkinter window object allows you to specify whether the window can be resized by the user in the horizontal and vertical directions. You can pass two boolean arguments to this method, such as w.resizable (False, False), to prevent both dimensions from being changed. Alternatively, you can pass 0 or 1 as arguments, such as w.resizable (0, 0), to achieve the same effect 1 .
References:
1 : https://stackoverflow.com/questions/36575890/how-to-set-a-tkinter-window-to-a-constant-size Other methods that can be used to control the window size are:
w.geometry () : This method allows you to set the initial size and position of the window by passing a string argument in the format "widthxheight+x+y", such as w.geometry ("500x500+100+100") 1 2 .
w.minsize () and w.maxsize (): These methods allow you to set the minimum and maximum size of the window in pixels, such as w.minsize (500, 500) and w.maxsize (1000, 1000) 1 2 .
w.pack_propagate () and w.grid_propagate (): These methods allow you to enable or disable the propagation of the size of the widgets inside the window to the window itself. By default, these methods are set to True, which means that the window will adjust its size according to the widgets it contains. You can set these methods to False or 0 to prevent this behavior, such as w.pack_propagate (0) or w.grid_propagate (0).
w.place (): This method allows you to place the window at a specific position and size relative to its parent window or screen. You can use keyword arguments such as x, y, width, height, relx, rely, relwidth, and relheight to specify the coordinates and dimensions of the window in absolute or relative terms, such as w.
place (x=0, y=0, relwidth=1, relheight=1).
References:
2 : https://stackoverflow.com/questions/25690423/set-window-dimensions-in-tkinter-python-3 :
https://stackoverflow.com/questions/36575890/how-to-set-a-tkinter-window-to-a-constant-size
/36576068#36576068 : https://www.skotechlearn.com/2020/06/tkinter-window-position-size-center-screen-in- python.html

64. Frage
Which of the following values can be returned by the messagebox. askquestion () method?

A. "yes" and "no"
B. "accept:" and "cancel''
C. l and o
D. True and False

Antwort: A

Begründung:
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 .

65. Frage
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