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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Programming | 18% | - HTTP & Client-Server Communication - JSON/XML Data Exchange - TCP/IP & Socket Programming - REST API Basics |
| Topic 2: GUI Programming | 20% | - Event-Driven Paradigm - Tkinter Basics & Widgets - Event Handling & Callbacks - Dialogs & Application Structure |
| Topic 3: Advanced Object-Oriented Programming | 25% | - Metaclasses & Metaprogramming - Multiple Inheritance & Mixins - Abstract Base Classes - Shallow vs Deep Copy & Serialization - Design Patterns - Advanced Exceptions & Exception Chaining - Attribute Access & Descriptors |
| Topic 4: Modules, Packages & Advanced Features | 10% | - Import System & Namespaces - Decorators & Context Managers - Functional Programming Tools |
| Topic 5: Coding Conventions, Best Practices & Standardization | 12% | - Pythonic Principles - PEP 1, PEP 8, PEP 20, PEP 257 - Code Readability & Documentation |
| Topic 6: File & Data Processing | 15% | - XML & JSON Parsing - Logging & System Interaction - SQLite3 Database Operations - CSV & Configuration Files |
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NEW QUESTION # 38
Analyze the following snippet and decide whether the code is correct and/or which method should be distinguished as a class method.
Answer: D
Explanation:
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.
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:
classCrossword:
numberofcrosswords =0
def __init__(self, author, title):
self.author = author
self.title = title
Crossword.numberofcrosswords +=1
@classmethod
defgetNumberofCrosswords(cls):
returncls.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.
NEW QUESTION # 39
What is true about the unbind_all () method?
(Select two answers.)
Answer: A,C
Explanation:
Explanation
The unbind_all() method in Tkinter is used to remove all event bindings from a widget. It is a method of the widget object and can be called on any widget in the Tkinter application. Therefore, option A is the correct answer.
Option B is incorrect because the method can be called on any widget, not just the main window widget.
Option C is correct as unbind_all() does not take any parameters.
Option D is incorrect because the method only removes event bindings and does not cause the widgets to disappear.
So, the correct answers are A and C.
References:
* Tkinter documentation: https://docs.python.org/3/library/tkinter.html#event-bindings
* Tkinter tutorial: https://www.python-course.eu/tkinter_events_binds.php
NEW QUESTION # 40
A property of the event object called widget is in fact:
Answer: B
Explanation:
The correct answer is A. In Tkinter event handling, an event object contains information about the event that occurred. One of its useful attributes is widget, which refers to the actual widget object that caused or received the event. This is not merely the widget's name as text; it is a reference to the widget instance itself. That means the event handler can inspect or manipulate the widget directly, for example by reading its configuration or changing its displayed value. Option B and option D are incorrect because they describe a name, not an object reference. Option C is unrelated, since run() is not part of Tkinter event object semantics.
NEW QUESTION # 41
Look at the following code snippets and decide which ones follow PEP 8 recommendations for whitespaces in expressions and statements (Select two answers.) A) No whitespace immediately before the opening parenthesis that starts the list of arguments of a function call:
B)
A whitespace immediately before a comma, semicolon, and colon:
C)
No whitespace between a trailing comma and a following closing parenthesis:
D)
A whitespace immediately after the opening parenthesis that starts indexing or slicing:
Answer: C,D
Explanation:
Option A is true because PEP 8 recommends avoiding extraneous whitespace immediately inside parentheses, brackets or braces 1 .
Option C is true because PEP 8 recommends avoiding extraneous whitespace between a trailing comma and a following close parenthesis 1 .
NEW QUESTION # 42
Which sentence about the property decorator is false?
Answer: A
Explanation:
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.
NEW QUESTION # 43
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