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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: GUI Programming | 20% | - Event-Driven Paradigm - Dialogs & Application Structure - Event Handling & Callbacks - Tkinter Basics & Widgets |
| Topic 2: Coding Conventions, Best Practices & Standardization | 12% | - Code Readability & Documentation - PEP 1, PEP 8, PEP 20, PEP 257 - Pythonic Principles |
| Topic 3: Advanced Object-Oriented Programming | 25% | - Metaclasses & Metaprogramming - Attribute Access & Descriptors - Abstract Base Classes - Multiple Inheritance & Mixins - Shallow vs Deep Copy & Serialization - Design Patterns - Advanced Exceptions & Exception Chaining |
| Topic 4: Modules, Packages & Advanced Features | 10% | - Import System & Namespaces - Functional Programming Tools - Decorators & Context Managers |
| Topic 5: File & Data Processing | 15% | - XML & JSON Parsing - SQLite3 Database Operations - Logging & System Interaction - CSV & Configuration Files |
| Topic 6: Network Programming | 18% | - JSON/XML Data Exchange - HTTP & Client-Server Communication - TCP/IP & Socket Programming - REST API Basics |
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NEW QUESTION # 10
Select the true statements related to PEP 257. (Select two answers.)
Answer: A,B
Explanation:
The correct answers are C and D. PEP 257 defines a docstring as a string literal that appears as the first statement in a module, function, class, or method definition. This placement is important because Python assigns that string to the object's __doc__ attribute, making it available to tools such as help(), IDEs, documentation generators, and introspection utilities. Option D is also correct because PEP 257 distinguishes between one-line docstrings and multi-line docstrings. Option A is false because a one-line docstring keeps its closing quotes on the same line. Option B is too broad: ordinary string literals appearing anywhere in code are not automatically treated as official runtime docstrings.
NEW QUESTION # 11
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:
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 # 12
Analyze the following snippet and select the statement that best describes it.
Answer: B
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:
B). The *args parameter holds a list of unnamed parameters, while the **kwargs parameter holds a dictionary of named parameters.
Reference:
Official Python documentation on Function definitions: https://docs.python.org/3/tutorial/controlflow.
html#defining-functions
The arg parameter holds a list of unnamed parameters . In the given code snippet, the f1 function takes two arguments: *arg and **kwarg . The *arg syntax in the function signature is used to pass a variable number of non-keyword (positional) arguments to the function. Inside the function, arg is a tuple containing the positional arguments passed to the function. The **kwarg syntax in the function signature is used to pass a variable number of keyword arguments to the function. Inside the function, kwarg is a dictionary containing the keyword arguments passed to the function.
NEW QUESTION # 13
Select the true statement about composition
Answer: A
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 # 14
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: A,B
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 # 15
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