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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Multithreading and Concurrency | 10% | - Concurrent programming
|
| Topic 2: File Processing and Serialization | 15% | - Data storage and transfer
|
| Topic 3: GUI Programming | 20% | - Graphical user interfaces with Tkinter
|
| Topic 4: Network Programming | 20% | - Communication and networking
|
| Topic 5: Python Standard Library and Best Practices | 10% | - Advanced Python development
|
| Topic 6: Advanced Object-Oriented Programming | 25% | - Object-oriented concepts
|
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NEW QUESTION # 44
Select the true statements related to PEP 8 naming conventions. (Select two answers.)
Answer: B,C
Explanation:
Explanation
Option A is true because PEP 8 recommends that function and variable names should be lowercase, with words separated by underscores .
Option D is true because PEP 8 recommends that constants should be written in all capital letters with words separated by underscores .
PEP 8 is the official style guide for Python code. It provides guidelines for how to write readable code that follows consistent naming conventions. The aim of PEP 8 is to improve the readability of Python code and make it easier to understand and maintain.
According to PEP 8, variable and function names should be written in all lower-case letters with words separated by underscores, as stated in A. Constants, which are variables whose value is expected to remain constant throughout the code, should be written in all upper-case letters with words separated by underscores, as stated in D.
References:
* PEP 8 -- Style Guide for Python Code: https://www.python.org/dev/peps/pep-0008/
* Python Documentation: https://docs.python.org/3/tutorial/classes.html#classmethods-and-staticmethods
NEW QUESTION # 45
Select the true statements about the following invocation:
(Select two answers.)
Answer: B,D
Explanation:
Explanation
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.
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.
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.
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 # 46
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 # 47
What will be the content of the cars.xml file when you run the following code?
import xml.etree.ElementTree as ET
root = ET.Element('data')
car_1 = ET.SubElement(root, 'car', {'brand': 'Audi'})
car_2 = ET.SubElement(root, 'car', {'brand': 'Volkswagen'})
tree = ET.ElementTree(root)
tree.write('cars.xml', 'UTF-8', True)
Answer: A
Explanation:
The correct answer is C. The code creates an XML root element named data and then adds two child elements named car. Each car element receives a brand attribute, one with the value Audi and the other with the value Volkswagen. The statement tree.write('cars.xml', 'UTF-8', True) writes the XML document using UTF-8 encoding and explicitly enables the XML declaration through the third argument. Because the XML declaration is enabled, the output begins with < ?xml version='1.0' encoding='UTF-8'? > . The generated XML body then contains the data element with two self-closing car child elements. Options without the encoding declaration are therefore incomplete.
NEW QUESTION # 48
A socket object is usually created by which one of the following invocations?
Answer: D
Explanation:
Explanation
A socket object is usually created using the socket() constructor provided by the socket module in Python. The correct invocation is socket.socket(socket_domain, socket_type). This creates a new socket object with the specified socket domain and type.
NEW QUESTION # 49
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