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| Section | Weight | Objectives |
|---|---|---|
| File & Data Processing | 15% | - CSV & Configuration Files - XML & JSON Parsing - Logging & System Interaction - SQLite3 Database Operations |
| Modules, Packages & Advanced Features | 10% | - Decorators & Context Managers - Functional Programming Tools - Import System & Namespaces |
| Network Programming | 18% | - TCP/IP & Socket Programming - REST API Basics - JSON/XML Data Exchange - HTTP & Client-Server Communication |
| Coding Conventions, Best Practices & Standardization | 12% | - Pythonic Principles - Code Readability & Documentation - PEP 1, PEP 8, PEP 20, PEP 257 |
| Advanced Object-Oriented Programming | 25% | - Design Patterns - Metaclasses & Metaprogramming - Shallow vs Deep Copy & Serialization - Attribute Access & Descriptors - Abstract Base Classes - Advanced Exceptions & Exception Chaining - Multiple Inheritance & Mixins |
| GUI Programming | 20% | - Dialogs & Application Structure - Event Handling & Callbacks - Tkinter Basics & Widgets - Event-Driven Paradigm |
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NEW QUESTION # 65
Select the true statement about composition
Answer: C
Explanation:
Explanation
Composition is an object-oriented design concept that models a has-a relationship. In composition, a class known as composite contains an object of another class known as component. In other words, a composite class has a component of another class1.
Composition allows a class to be projected as a container of different classes.
Composition is a concept in Python that allows for building complex objects out of simpler objects, by aggregating one or more objects of another class as attributes. The objects that are aggregated are generally considered to be parts of the whole object, and the containing object is often viewed as a container for the smaller objects.
In composition, objects are combined in a way that allows for greater flexibility and modifiability than what inheritance can offer. With composition, it is possible to create new objects by combining existing objects, by using a container object to host other objects. By contrast, with inheritance, new objects extend the behavior of their parent classes, and are limited by that inheritance hierarchy.
References:
* Official Python documentation on
Composition: https://docs.python.org/3/tutorial/classes.html#composition
* GeeksforGeeks article on Composition vs
Inheritance: https://www.geeksforgeeks.org/composition-vs-inheritance-python/
* Real Python article on Composition and
Inheritance: https://realpython.com/inheritance-composition-python/
NEW QUESTION # 66
If w is a correctly created main application window, which method would you use to foe both of the main window's dimensions?
Answer: C
Explanation:
Explanation
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:
importtkinter 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 effect1.
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")12.
* 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)12.
* 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#36576
https://www.skotechlearn.com/2020/06/tkinter-window-position-size-center-screen-in-python.html
NEW QUESTION # 67
Which sentence about the property decorator is false?
Answer: B
Explanation:
The @property decorator should be defined after the method that is responsible for setting an encapsulated attribute is a false sentence. In fact, the @property decorator should be defined before the method that is used to set the attribute value. The @property decorator and the setter and deleter methods work together to create an encapsulated attribute, which is used to provide control over the attribute's value.
Reference:
Official Python documentation on Property: https://docs.python.org/3/library/functions.html#property The @property decorator is used to designate a method as a getter for an instance attribute. The method decorated with @property should be defined before any setter or deleter methods for the same attribute.
NEW QUESTION # 68
Select the true statement about the socket. gaierror exception.
Answer: B
Explanation:
The socket.gaierror exception is raised when an address-related error caused by the getaddrinfo() and getnameinfo() functions occurs. These functions are used to translate hostnames to IP addresses and vice versa, and the gaierror exception is raised if they fail to perform this translation.
Reference:
Official Python documentation on socket.gaierror: https://docs.python.org/3/library/socket.html#socket.
gaierror
NEW QUESTION # 69
What is true about the constructor's argument, which sets the button's title to a desired string?
Answer: B
Explanation:
The correct answer is D. In Tkinter, the text displayed on a Button widget is normally configured with the keyword argument text. For example, Button(root, text="OK") creates a button whose visible caption is OK. This value is not determined by the second or third positional argument in a reliable, recommended way. Tkinter widget constructors are designed to receive the parent widget first and then configuration options as keyword arguments. The keyword title is not the standard option for button captions; titles are associated more with windows, such as setting a top-level window title. For a button' s label, the correct constructor argument is text.
NEW QUESTION # 70
......
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