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| Section | Weight | Objectives |
|---|---|---|
| File & Data Processing | 15% | - XML & JSON Parsing - CSV & Configuration Files - Logging & System Interaction - SQLite3 Database Operations |
| Network Programming | 18% | - TCP/IP & Socket Programming - JSON/XML Data Exchange - REST API Basics - HTTP & Client-Server Communication |
| GUI Programming | 20% | - Event-Driven Paradigm - Dialogs & Application Structure - Event Handling & Callbacks - Tkinter Basics & Widgets |
| Advanced Object-Oriented Programming | 25% | - Multiple Inheritance & Mixins - Metaclasses & Metaprogramming - Design Patterns - Advanced Exceptions & Exception Chaining - Abstract Base Classes - Attribute Access & Descriptors - Shallow vs Deep Copy & Serialization |
| Coding Conventions, Best Practices & Standardization | 12% | - PEP 1, PEP 8, PEP 20, PEP 257 - Code Readability & Documentation - Pythonic Principles |
| Modules, Packages & Advanced Features | 10% | - Decorators & Context Managers - Functional Programming Tools - Import System & Namespaces |
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NEW QUESTION # 16
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 # 17
Which of the following methods allow you to load a configuration using ConfigParser? (Select two answers.)
Answer: C,D
Explanation:
Explanation
ConfigParser is a built-in library in Python that allows you to read and write configuration files. The read method is used to read the configuration file which can be in any of the supported file formats, such as INI, YAML, and JSON. The read_dict method is used to read the configuration from a Python dictionary. The read_conf and read_str options are not valid methods in the ConfigParser module.
Therefore, the correct options to load a configuration using ConfigParser are A. read and D. read_string.
NEW QUESTION # 18
Which of the following methods allow you to load a configuration using ConfigParser? (Select two answers.)
Answer: C,D
Explanation:
ConfigParser is a built-in library in Python that allows you to read and write configuration files. The read method is used to read the configuration file which can be in any of the supported file formats, such as INI, YAML, and JSON. The read_dict method is used to read the configuration from a Python dictionary. The read_conf and read_str options are not valid methods in the ConfigParser module.
Therefore, the correct options to load a configuration using ConfigParser are A. read and D. read_string.
Reference: Official Python documentation on ConfigParser: https://docs.python.org/3/library/configparser.
html
NEW QUESTION # 19
What does the term deserialization mean? Select the best answer.
Answer: B
Explanation:
A). Deserialization is the process of converting data that has been serialized or encoded in a specific format, back into its original form as an object or a data structure in memory. In Python, this typically involves creating Python objects based on sequences of bytes that have been serialized using a protocol such as JSON, Pickle, or YAML.
For example, if you have a Python object my_obj and you want to serialize it to a JSON string, you might do something like this:
import json
serialized_obj = json. dumps (my_obj)
To deserialize the JSON string back into a Python object, you would use the json.loads() method:
deserialized_obj = json. loads (serialized_obj)
This would convert the JSON string back into its original Python object form.
Reference:
Official Python Documentation on Serialization: https://docs.python.org/3/library/pickle.html#module-pickle Real Python Tutorial on Serialization and Deserialization in Python: https://realpython.com/python- serialization/ Deserialization is the process of converting a sequence of bytes, such as a file or a network message, into a Python object. This is the opposite of serialization, which is the process of converting a Python object into a sequence of bytes for storage or transmission.
NEW QUESTION # 20
Select the true statements about the following invocation:
(Select two answers.)
Answer: C,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 # 21
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