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Python Institute PCPP1 - Certified Professional in Python Programming 1 Sample Questions (Q43-Q48):

NEW QUESTION # 43
What is true about the invocation of the cget () method?

A. It can be used to set new values to widget attributes.
B. It can be used to read widget attributes.
C. It can be replaced with a dictionary-like access manner.
D. It has the same effect as the config () method.

Answer: B

Explanation:
Explanation
The cget() method in Python is used to read the configuration options of a widget in Tkinter. It retrieves the value of a specified configuration option for a Tkinter widget. Hence, option A is the correct answer.

NEW QUESTION # 44
Analyze the following snippet and select the statement that best describes it.
Reliable PCPP-32-101 Test Questions | Professional PCPP-32-101 Exam Score: PCPP1 - Certified Professional in Python Programming 1 100% Pass

A. The code is erroneous as the OwnMath class does not inherit from any Exception type class
B. The code is an example of explicitly chained exceptions.
C. The code is fine and the script execution is not interrupted by any exception.
D. The code is an example of implicitly chained exceptions.

Answer: B

Explanation:
Explanation
In the given code snippet, an instance of OwnMath exception is raised with an explicitly specified __cause__ attribute that refers to the original exception (ZeroDivisionError). This is an example of explicitly chaining exceptions in Python.

NEW QUESTION # 45
Select the true statement about the___name___attribute.

A. __name___is a special attribute, which is inherent for classes and it contains information about the class to which a class instance belongs.
B. __name___is a special attribute, which is inherent for classes, and it contains the name of a class.
C. ___name___is a special attribute, which is inherent for both classes and instances, and it contains information about the class to which a class instance belongs.
D. ___name is a special attribute, which is inherent for both classes and instances, and it contains a dictionary of object attributes.

Answer: B

Explanation:
Explanation
The true statement about the __name__ attribute is D. name is a special attribute, which is inherent for classes, and it contains the name of a class. The __name__ attribute is a special attribute of classes that contains the name of the class as a string.
The __name__ attribute is a special attribute in Python that is available for all classes, and it contains the name of the class as a string. The __name__ attribute can be accessed from both the class and its instances using the dot notation.

NEW QUESTION # 46
Select the true statements about the connection-oriented and connectionless types of communication. (Select two answers.)

A. A phone call is an example of a connection-oriented communication
B. Connectionless communications are usually built on top of TCP
C. Using walkie-talkies is an example of a connection-oriented communication
D. In the context of TCP/IP networks, the communication side that initiates a connection is called the client, whereas the side that answers the client is called the server

Answer: A,D

Explanation:
Explanation
In the context of TCP/IP networks, the communication side that initiates a connection is called the client, whereas the side that answers the client is called the server.
This statement is true because TCP/IP networks use a client-server model to establish connection-oriented communications. The client is the device or application that requests a service or resource from another device or application, which is called the server. The server responds to the client's request and provides the service or resource.For example, when you browse a website using a web browser, the browser acts as a client and sends a request to the web server that hosts the website. The web server acts as a server and sends back the requested web page to the browser1.
Connectionless communications are usually built on top of TCP.
This statement is false because TCP (Transmission Control Protocol) is a connection-oriented protocol that requires establishing and terminating a connection before and after sending data. Connectionless communications are usually built on top of UDP (User Datagram Protocol), which is a connectionless protocol that does not require any connection setup or teardown. UDP simply sends data packets to the destination without checking if they are received or not2.
Using walkie-talkies is an example of a connection-oriented communication.
This statement is false because using walkie-talkies is an example of a connectionless communication.
Walkie-talkies do not establish a dedicated channel or connection between the sender and receiver before transmitting data. They simply broadcast data over a shared frequency without ensuring that the receiver is ready or available to receive it. The sender does not know if the receiver has received the data or not3.
A phone call is an example of a connection-oriented communication.
This statement is true because a phone call is an example of a connection-oriented communication. A phone call requires setting up a circuit or connection between the caller and callee before exchanging voice data. The caller and callee can hear each other's voice and know if they are connected or not. The phone call also requires terminating the connection when the conversation is over4.
References:
1: https://www.techtarget.com/searchnetworking/definition/client-server 2:
https://www.javatpoint.com/connection-oriented-vs-connectionless-service 3:
https://en.wikipedia.org/wiki/Walkie-talkie 4: https://en.wikipedia.org/wiki/Telephone_call A is true because in the context of TCP/IP networks, the communication side that initiates a connection is called the client, and the side that answers the client is called the server. This is the basis for establishing a connection-oriented communication.
D is true because a phone call is an example of a connection-oriented communication. Like TCP/IP, a phone call establishes a connection between two devices (in this case, two phones) before communication can occur.
A is true because in the context of TCP/IP networks, the communication side that initiates a connection is called the client, and the side that answers the client is called the server. This is the basis for establishing a connection-oriented communication.
D is true because a phone call is an example of a connection-oriented communication. Like TCP/IP, a phone call establishes a connection between two devices (in this case, two phones) before communication can occur.
B is false because connectionless communications are usually built on top of UDP, not TCP. UDP is a connectionless protocol that does not establish a connection before sending data.
C is false because using walkie-talkies is an example of a connectionless communication. Walkie-talkies do not establish a connection before communication begins, and messages are simply broadcasted to all devices within range.
Here is a sample code in Python using the socket module to create a TCP server and client to demonstrate the connection-oriented communication:
Server-side code:
importsocket
HOST ='127.0.0.1'
PORT =8080
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.bind((HOST, PORT))
s.listen()
conn, addr = s.accept()
with conn:
print('Connected by', addr)
whileTrue:
data = conn.recv(1024)
ifnotdata:
break
conn.sendall(data)
Client-side code:
importsocket
HOST ='127.0.0.1'
PORT =8080
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect((HOST, PORT))
s.sendall(b'Hello, world')
data = s.recv(1024)
print('Received',repr(data))
The server listens for incoming connections on port 8080, and when a connection is established, it prints the address of the client that has connected. The server then continuously receives data from the client and sends it back to the client until the connection is closed.
The client establishes a connection with the server and sends the message "Hello, world" encoded as bytes. It then waits for a response from the server and prints the data it receives.

NEW QUESTION # 47
Select the true statement about composition

A. Composition allows a class to be projected as a container of different classes
B. Composition extends a class's capabilities by adding new components and modifying the existing ones.
C. Composition is a concept that promotes code reusability while inheritance promotes encapsulation.
D. Composition is based on the has a relation: so it cannot be used together with inheritance.

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 # 48
......

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Reliable PCPP-32-101 Test Questions | Professional PCPP-32-101 Exam Score: PCPP1 - Certified Professional in Python Programming 1 100% Pass

Three High in Demand Python Institute PCPP-32-101 Exam Questions Formats

Python Institute PCPP1 - Certified Professional in Python Programming 1 Sample Questions (Q43-Q48):

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