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| Section | Objectives |
|---|---|
| Topic 1: GUI Programming | - Tkinter fundamentals
|
| Topic 2: Advanced Object-Oriented Programming | - Class design and advanced inheritance
|
| Topic 3: Python Standard Library and Best Practices | - File and data processing
|
| Topic 4: Network Programming and Communication | - Web communication basics
|
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NEW QUESTION # 46
Select the true statements about sockets. (Select two answers)
Answer: B,D
Explanation:
Explanation
A socket is a connection point that enables a two-way communication between programs running in a network.
This statement is true because a socket is a software structure that serves as an endpoint for sending and receiving data across a network. A socket is defined by an application programming interface (API) for the networking architecture, such as TCP/IP. A socket can be used to establish a communication channel between two programs running on the same or different network nodes12.
A socket is always the secure means by which computers on a network can safely communicate, without the risk of exposure to an attack.
This statement is false because a socket by itself does not provide any security or encryption for the data transmitted over the network. A socket can be vulnerable to various types of attacks, such as eavesdropping, spoofing, hijacking, or denial-of-service. To ensure secure communication, a socket can use additional protocols or mechanisms, such as SSL/TLS, SSH, VPN, or firewall3.
A socket is a connection point that enables a one-way communication only between remote processes.
This statement is false because a socket can enable both one-way and two-way communication between processes running on the same or different network nodes. A socket can be used for connection-oriented or connectionless communication, depending on the type of protocol used. For example, TCP is a connection-oriented protocol that provides reliable and bidirectional data transfer, while UDP is a connectionless protocol that provides unreliable and unidirectional data transfer12.
A socket can be used to establish a communication endpoint for processes running on the same or different machines.
This statement is true because a socket can be used for inter-process communication (IPC) within a single machine or across different machines on a network. A socket can use different types of addresses to identify the processes involved in the communication, such as IP address and port number for network sockets, or file name or path for Unix domain sockets12.
References:
1: https://en.wikipedia.org/wiki/Network_socket 2:
https://www.geeksforgeeks.org/socket-in-computer-network/ 3:
https://www.tutorialspoint.com/what-is-a-network-socket-computer-networks
NEW QUESTION # 47
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 # 48
Which of the following will set the button text's font to 12 point italics Anal? (Select two answers)
Answer: B,D
Explanation:
Explanation
Option B is correct because it sets the font option of the button to a tuple containing the font family ('Arial'), size (12), and style ('italic').
Option C is correct because it sets the font option of the button to a string containing the font family ('Arial'), size (12), and style ('italic') separated by spaces.
NEW QUESTION # 49
Analyze the following snippet and select the statement that best describes it.
Answer: A
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 # 50
Select the true statements related to PEP 8 programming recommendations for exception handling. (Select two answers.)
Answer: A,B
Explanation:
The correct answers are C and D. Custom application exceptions should normally inherit from Exception, not directly from BaseException. BaseException is intended for system-exiting exceptions such as SystemExit, KeyboardInterrupt, and GeneratorExit, so deriving ordinary errors from it can interfere with normal control flow. PEP 8 also discourages broad or bare except: clauses because they catch too much and can hide programming errors or prevent expected interruption behavior. Specific exception handling is clearer, safer, and easier to debug. Option A reverses the intended guidance:
exception hierarchies should help code distinguish what went wrong programmatically. Option B is false because a bare except: can catch system-level exceptions, which is exactly why it should be avoided.
NEW QUESTION # 51
......
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