PCPP-32-101 Free Certification Exam Material from Real4Prep with 46 Questions
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Python Institute PCPP-32-101 exam, also known as the PCPP1 exam, is a certification exam designed to test a candidate's proficiency in the Python programming language. PCPP-32-101 exam is intended for individuals who are seeking to demonstrate their knowledge and skills in Python programming, and it covers a range of topics including data types, control structures, functions, modules, and more.
The PCPP-32-101 exam is designed for individuals who are new to Python programming or want to validate their foundational knowledge of Python. PCPP-32-101 exam covers topics such as data types, control structures, functions, modules, and object-oriented programming. Candidates who pass the exam will have a strong foundation in Python programming and will be able to write Python code that is efficient, readable, and maintainable.
NEW QUESTION # 15
Analyze the code and choose the best statement that describes it.
- A. ___ne___() is not a built-in special method
- B. The code is erroneous
- C. The code is responsible for the support of the inequality operator i.e. i =
- D. The code is responsible for the support of the negation operator e.g. a = - a.
Answer: C
Explanation:
Explanation
The correct answer is D. The code is responsible for the support of the inequality operator i.e. i != j. In the given code snippet, the __ne__ method is a special method that overrides the behavior of the inequality operator != for instances of the MyClass class. When the inequality operator is used to compare two instances of MyClass, the __ne__ method is called to determine whether the two instances are unequal.
NEW QUESTION # 16
Select the true statements about the connection-oriented and connectionless types of communication. (Select two answers.)
- A. Using walkie-talkies is an example of a connection-oriented communication
- B. A phone call is an example of a connection-oriented communication
- C. 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
- D. Connectionless communications are usually built on top of TCP
Answer: B,C
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 # 17
What is true about type in the object-oriented programming sense?
- A. It is an object used to instantiate a class
- B. It is a built-in method that allows enumeration of composite objects
- C. It is the topmost type that any class can inherit from
- D. It is the bottommost type that any object can inherit from.
Answer: C
Explanation:
Explanation
In Python, type is the built-in metaclass that serves as the base class for all new-style classes. All new-style classes in Python, including built-in types like int and str, are instances of the type metaclass and inherit from it.
NEW QUESTION # 18
If purple can be obtained from mixing red and blue, which color codes represent the two ingredients? Select two answers)
- A. #FF0000
- B. #000000
- C. #FFFFFF
- D. #0000FF
Answer: A,D
NEW QUESTION # 19
Select the true statement about composition
- A. Composition is a concept that promotes code reusability while inheritance promotes encapsulation.
- B. Composition extends a class's capabilities by adding new components and modifying the existing ones.
- C. Composition is based on the has a relation: so it cannot be used together with inheritance.
- D. Composition allows a class to be projected as a container of different classes
Answer: D
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 # 20
Select the true statements related to PEP 8 naming conventions. (Select two answers.)
- A. Constants should be written in all lower-case letters with words separated by underscores
- B. Function and variable names should be lower-case with words separated by underscores.
- C. You should always use self as the first argument to instance methods, and cls as the first argument to class methods.
- D. Modules should have short names written in CameICase.
Answer: A,B
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 # 21
Which of the following methods allow you to load a configuration using ConfigParser? (Select two answers.)
- A. read
- B. read_str
- C. read_dict
- D. read_conf
Answer: A,B
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 # 22
What is true about the unbind_all () method?
(Select two answers.)
- A. It can be invoked from any widget
- B. It is parameterless
- C. It can be invoked from the main window widget only
- D. It causes all the widgets to disappear
Answer: A,B
Explanation:
Explanation
The unbind_all() method in Tkinter is used to remove all event bindings from a widget. It is a method of the widget object and can be called on any widget in the Tkinter application. Therefore, option A is the correct answer.
Option B is incorrect because the method can be called on any widget, not just the main window widget.
Option C is correct as unbind_all() does not take any parameters.
Option D is incorrect because the method only removes event bindings and does not cause the widgets to disappear.
So, the correct answers are A and C.
References:
* Tkinter documentation: https://docs.python.org/3/library/tkinter.html#event-bindings
* Tkinter tutorial: https://www.python-course.eu/tkinter_events_binds.php
NEW QUESTION # 23
What isa___traceback___?
(Select two answers )
- A. An attribute owned by every exception object
- B. An attribute that holds interesting information that is particularly useful when the programmer wants to store exception details in other objects
- C. An attribute that is added to every object when the traceback module is imported
- D. A special method delivered by the traceback module to retrieve a full list of strings describing thetraceback
Answer: A,B
Explanation:
Explanation
The correct answers are A. An attribute owned by every exception object and D. An attribute that holds interesting information that is particularly useful when the programmer wants to store exception details in other objects. A traceback is an attribute of an exception object that contains a stack trace representing the call stack at the point where the exception was raised. The traceback attribute holds information about the sequence of function calls that led to the exception, which can be useful for debugging and error reporting.
NEW QUESTION # 24
Select the true statement about the socket. gaierror exception.
- A. It is raised when a system function returns a system-related error.
- B. It is raised when a timeout occurs on a socket.
- C. It is raised when an address-related error caused by the getaddrinfo () and getnameinfo () functions occurs.
- D. It is raised when an address-related error caused by the repr () function occurs.
Answer: C
Explanation:
Explanation
The socket.gaierror exception is raised when an address-related error caused by the getaddrinfo() and getnameinfo() functions occurs. These functions are used to translate hostnames to IP addresses and vice versa, and the gaierror exception is raised if they fail to perform this translation.
NEW QUESTION # 25
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 both classes and instances, and it contains a dictionary of object attributes.
- 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 classes, and it contains the name of a class.
Answer: D
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 # 26
Analyze the following snippet and decide whether the code is correct and/or which method should be distinguished as a class method.
- A. The code is erroneous.
- B. There is only one initializer, so there is no need for a class method.
- C. The getNumberofCrosswords () method should be decorated With @classmethod.
- D. The gexNumberOfcrosswords () and issrived methods should be decorated with @classzoechod.
Answer: C
Explanation:
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.
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:
classCrossword:
numberofcrosswords =0
def __init__(self, author, title):
self.author = author
self.title = title
Crossword.numberofcrosswords +=1
@classmethod
defgetNumberofCrosswords(cls):
returncls.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.
NEW QUESTION # 27
Select the true statements related to PEP 8 programming recommendations for code writing. (Select two answers:)
- A. You should not write string literals that rely on significant trailing whitespaces as they may be visually indistinguishable, and certain editors may trim them
- B. You should make object type comparisons using the ismstanceQ method (e.g. if isinstance (obj, int) :) instead of comparing types directly (eg if type(obj) is type(i)).
- C. You should use the not ... is operator (e.g. if not spam is None:), rather than the is not operator (e.g.if spam is notNone:), to increase readability.
- D. You should write code in a way that favors the CPython implementation over PyPy, Cython. and Jython.
Answer: A,B
Explanation:
Explanation
The two true statements related to PEP 8 programming recommendations for code writing are Option B and Option D.
Option B is true because PEP 8 recommends making object type comparisons using the isinstance() method instead of comparing types directly 1.
Option D is true because PEP 8 recommends not writing string literals that rely on significant trailing whitespaces as they may be visually indistinguishable, and certain editors may trim them 1.
NEW QUESTION # 28
Which function or operator should you use to obtain the answer True or False to the question: "Do two variables refer to the same object?"
- A. The id () function
- B. The isinstanceO function
- C. The = operator
- D. The is operator
Answer: D
Explanation:
Explanation
To test whether two variables refer to the same object in memory, you should use the is operator.
The is operator returns True if the two variables point to the same object in memory, and False otherwise.
For example:
a = [1, 2, 3]
b = a
c = [1, 2, 3]
print(a is b) # True
print(a is c) # False
In this example, a and b refer to the same list object in memory, so a is b returns True. On the other hand, a and c refer to two separate list objects with the same values, so a is c returns False.
NEW QUESTION # 29
Which of the following examples using line breaks and different indentation methods are compliant with PEP
8 recommendations? (Select two answers.)
- A.
- B.
- C.
- D.
Answer: A,C
Explanation:
Explanation
The correct answers are B. Option B and D. Option D. Both options B and D are compliant with PEP 8 recommendations for line breaks and indentation. PEP 8 recommends using 4 spaces per indentation level and breaking lines before binary operators. In option B, the arguments to the print function are aligned with the opening delimiter, which is another acceptable way toformat long lines according to PEP 8. In option D, the second line is indented by 4 spaces to distinguish it from the next logical line.
NEW QUESTION # 30
Select the true statements about the following invocation:
(Select two answers.)
- A. It addresses a service located at the following address local.host.com.
- B. It addresses a service deployed at localhost (the host where the code is run).
- C. It addresses a service listening at port 3000.
- D. It addresses a service whose timeout is set to 3000 ms.
Answer: B,C
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 # 31
Which of the following values can be returnedby the messagebox. askquestion () method?
- A. "yes" and "no"
- B. l and o
- C. "accept:" and "cancel''
- D. True and False
Answer: A
Explanation:
Explanation
The messagebox.askquestion() method in Python's tkinter library displays a message box with a specified question and two response buttons labeled "Yes" and "No". It returns a string indicating which button was selected - either "yes" or "no".
This function is used to ask questions to the user that have only two options: YES or NO. It can be used to ask the user if they want to continue or if they want to submit something 1.
NEW QUESTION # 32
Select the true statements about sockets. (Select two answers)
- A. A socket can be used to establish a communication endpoint for processes running on the same or different machines.
- B. A socket is a connection point that enables a one-way communication only between remote processes
- C. A socket is a connection point that enables a two-way communication between programs running in a network.
- D. A socket is always the secure means by which computers on a network can safely communicate, without the risk of exposure to an attack
Answer: A,C
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 # 33
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