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| Section | Weight | Objectives |
|---|---|---|
| File & Data Processing | 15% | - SQLite3 Database Operations - XML & JSON Parsing - Logging & System Interaction - CSV & Configuration Files |
| Advanced Object-Oriented Programming | 25% | - Advanced Exceptions & Exception Chaining - Design Patterns - Metaclasses & Metaprogramming - Attribute Access & Descriptors - Shallow vs Deep Copy & Serialization - Abstract Base Classes - Multiple Inheritance & Mixins |
| Modules, Packages & Advanced Features | 10% | - Import System & Namespaces - Functional Programming Tools - Decorators & Context Managers |
| Network Programming | 18% | - REST API Basics - HTTP & Client-Server Communication - JSON/XML Data Exchange - TCP/IP & Socket Programming |
| GUI Programming | 20% | - Tkinter Basics & Widgets - Event-Driven Paradigm - Dialogs & Application Structure - Event Handling & Callbacks |
| Coding Conventions, Best Practices & Standardization | 12% | - PEP 1, PEP 8, PEP 20, PEP 257 - Pythonic Principles - Code Readability & Documentation |
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NEW QUESTION # 65
What is wrong with the following snippet?
class A:
def run(self):
print("A is running")
class B(A):
def run(self):
print("B is running")
class C(A, B):
def fly(self):
print("C is flying")
c = C()
Answer: D
Explanation:
The issue is method resolution order, commonly called MRO. In Python multiple inheritance, the interpreter must build a consistent linear inheritance path for the class. Here, B already inherits from A, meaning B must appear before A in the resolution order. However, class C(A, B) asks Python to resolve A before B. These two requirements conflict, so Python cannot create a valid MRO for class C.
This results in a TypeError related to inconsistent method resolution order. The absence of an
__init__() method is not a problem because Python supplies a default initializer. Also, C can inherit run() if the inheritance order is valid.
NEW QUESTION # 66
Which of the following types cannot be pickled?
Answer: C
Explanation:
The correct answer is B because Python's pickle module can serialize many built-in data types, including integers, floating-point numbers, complex numbers, strings, bytes, bytearrays, booleans, and None. However, it does not serialize the actual implementation or definition body of functions and classes. Top-level functions and classes may sometimes be pickled by reference using their fully qualified names, but their code definitions are not stored inside the pickle byte stream. This distinction matters: pickle records enough information to locate an object again during unpickling, but it does not preserve source code, nested definitions, lambda functions, or dynamically created definitions in a portable way. Therefore, "function and class definitions" is the option that cannot truly be pickled as definitions.
NEW QUESTION # 67
Analyze the following snippet and decide whether the code is correct and/or which method should be distinguished as a class method.
Answer: C
Explanation:
The correct answer is B. The getNumberofCrosswords() method should be decorated with @classmethod . In the given code snippet, the getNumberofCrosswords method is intended to be a class method that returns the value of the numberofcrosswords class variable. However, the method is not decorated with the @classmethod decorator and does not take a cls parameter representing the class itself. To make getNumberofCrosswords a proper class method, it should be decorated with @classmethod and take a cls parameter as its first argument.
B). The getNumberofCrosswords() method should be decorated with @classmethod .
This is because the getNumberofCrosswords() method is intended to access the class-level variable numberofcrosswords , but it is defined as an instance method, which requires an instance of the class to be created before it can be called. To make it work as a class-level method, you can define it as a class method by adding the @classmethod decorator to the function.
Here's an example of how to define getNumberofCrosswords() as a class method:
class Crossword :
numberofcrosswords = 0
def __init__(self, author, title):
self.author = author
self.title = title
Crossword.numberofcrosswords += 1
@classmethod
def getNumberofCrosswords (cls):
return cls.numberofcrosswords
In this example, getNumberofCrosswords() is defined as a class method using the @classmethod decorator, and the cls parameter is used to access the class-level variable numberofcrosswords .
Reference:
Official Python documentation on Classes: https://docs.python.org/3/tutorial/classes.html
NEW QUESTION # 68
Which of the following values can be returned by the messagebox. askquestion () method?
Answer: C
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 .
NEW QUESTION # 69
What will happen if the mamwindow is too small to fit all its widgets?
Answer: A
Explanation:
Explanation
If the main window is too small to fit all its widgets, some widgets may be invisible. So, the correct answer is Option A.
When a window is not large enough to display all of its content, some widgets may be partially or completely hidden. The window will not automatically expand to fit all of its content, and no exception will be raised. The widgets will not be automatically scaled down to fit the window's size.
If the main window is too small to fit all its widgets, some of the widgets may not be visible or may be partially visible. This is because the main window has a fixed size, and if there are more widgets than can fit within that size, some of them will be outside the visible area of the window.
To avoid this issue, you can use layout managers such as grid, pack, or place to dynamically adjust the size and position of the widgets as the window changes size. This will ensure that all the widgets remain visible and properly arranged regardless of the size of the main window.
References:
* https://www.tkdocs.com/tutorial/widgets.html#managers
* https://www.geeksforgeeks.org/python-tkinter-widgets/
* https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/introduction.html
NEW QUESTION # 70
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