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| Section | Weight | Objectives |
|---|---|---|
| Multithreading and Concurrency | 10% | - Concurrent programming
|
| Python Standard Library and Best Practices | 10% | - Advanced Python development
|
| Network Programming | 20% | - Communication and networking
|
| File Processing and Serialization | 15% | - Data storage and transfer
|
| GUI Programming | 20% | - Graphical user interfaces with Tkinter
|
| Advanced Object-Oriented Programming | 25% | - Object-oriented concepts
|
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NEW QUESTION # 50
Which of the following statements regarding the __traceback__ attribute are true?
(Select two answers.)
Answer: B,D
Explanation:
The correct answers are B and C. In Python, exception objects have a __traceback__ attribute that stores traceback information connected with the point where the exception was raised. This makes option C true. The traceback object can be processed using functions from the traceback module, including traceback.format_tb(), which formats traceback entries into readable strings, so option B is also true. Option A is wrong because __traceback__ is not a special method and is not "delivered" by the traceback module; it is an exception attribute. Option D is also incorrect because the attribute is not limited only to exceptions in an explicit or implicit exception chain.
NEW QUESTION # 51
Analyze the following snippet and choose the best statement that describes it.
class Sword:
var1 = 'weapon'
def __init__(self):
self.name = 'Excalibur'
s1 = Sword()
Answer: A
Explanation:
The correct answer is D because var1 is a class variable defined directly inside the Sword class body.
Class variables belong to the class object itself and can be accessed or updated by qualifying them with the class name, such as Sword.var1 = 'blade'. The snippet does not raise an AttributeError or ValueError; creating s1 = Sword() correctly calls __init__() and assigns the instance attribute self.
name. Option C is not correct in this context because cls is only automatically available inside a class method when declared as the first parameter. Outside such a method, cls is just an undefined name unless explicitly assigned.
NEW QUESTION # 52
Look at the following examples of comments and docstrings in PythonSelect the ones that are useful and compliant with PEP 8 recommendations (Select the two best answers.) A)
Answer: C,D
Explanation:
Explanation
According to PEP 8 recommendations, the two best options are Option B and Option D.
Option B follows PEP 8's suggestion that all lines should be limited to 79 characters and for longer blocks of text like docstrings or comments, the length should be limited to 72 characters1. Option D follows PEP 8's conventions for writing good documentation strings (a.k.a. "docstrings") which are immortalized in PEP
257. It suggests writing docstrings for all public modules, functions, classes, and methods2.
NEW QUESTION # 53
What will happen if the mamwindow is too small to fit all its widgets?
Answer: D
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 # 54
Select the true statements about the following invocation:
(Select two answers.)
Answer: A,B
Explanation:
A). It addresses a service deployed at localhost (the host where the code is run).
This statement is true because localhost is a special hostname that refers to the local machine or the current host where the code is run. It is equivalent to using the IP address 127.0.0.1, which is the loopback address of the network interface. By using localhost as the hostname, the invocation addresses a service that is deployed on the same machine as the client.
D). It addresses a service listening at port 3000.
This statement is true because port 3000 is the part of the URL that follows the colon after the hostname. It specifies the port number where the service is listening for incoming requests. A port number is a 16-bit integer that identifies a specific process or application on a host. By using port 3000, the invocation addresses a service that is listening at that port.
B). It addresses a service whose timeout is set to 3000 ms.
This statement is false because timeout is not a part of the URL, but a parameter that can be passed to the requests.get () function in Python. Timeout specifies how long to wait for the server to send data before giving up. It is measured in seconds, not milliseconds. By using timeout=3, the invocation sets the timeout to 3 seconds, not 3000 ms.
C). It addresses a service located at the following address local.host.com.
This statement is false because local.host.com is not the same as localhost. Local.host.com is a fully qualified domain name (FQDN) that consists of three parts: local, host, and com. It requires DNS resolution to map it to an IP address. Localhost, on the other hand, is a special hostname that does not require DNS resolution and always maps to 127.0.0.1. By using localhost as the hostname, the invocation does not address a service located at local.host.com.
References:
https://docs.python.org/3/library/requests.html : https://en.wikipedia.org/wiki/Localhost : https://en.
wikipedia.org/wiki/Port_(computer_networking) : https://en.wikipedia.org/wiki/Fully_qualified_domain_name
NEW QUESTION # 55
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