Python Institute PCPP1 - Certified Professional in Python Programming 1 PCPP-32-101 Exam Questions

Answer : A

A socket object is usually created using the socket() constructor provided by the socket module in Python. The correct invocation issocket.socket(socket_domain, socket_type). This creates a new socket object with the specified socket domain and type.

Answer : D

The true statement about the__name__attribute isD.nameis 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.

Official Python documentation on Classes:https://docs.python.org/3/tutorial/classes.html#class-objects

Answer : B

The provided code snippet defines a functionf1that accepts variable-length arguments using the*argsand**kwargssyntax. The*argsparameter allows for an arbitrary number of unnamed arguments to be passed to the function as a tuple, while the**kwargsparameter 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:

1. The*argsparameter holds a list of unnamed parameters, while the**kwargsparameter holds a dictionary of named parameters.

Official Python documentation on Function definitions:https://docs.python.org/3/tutorial/controlflow.html#defining-functions

Thearg parameter holds a list of unnamed parameters. In the given code snippet, thef1function takes two arguments:*argand**kwarg. The*argsyntax in the function signature is used to pass a variable number of non-keyword (positional) arguments to the function. Inside the function,argis a tuple containing the positional arguments passed to the function. The**kwargsyntax in the function signature is used to pass a variable number of keyword arguments to the function. Inside the function,kwargis a dictionary containing the keyword arguments passed to the function.

Answer : B

The correct answer isB. The getNumberofCrosswords() method should be decorated with @classmethod. In the given code snippet, thegetNumberofCrosswordsmethod is intended to be a class method that returns the value of thenumberofcrosswordsclass variable. However, the method is not decorated with the@classmethoddecorator and does not take aclsparameter representing the class itself. To makegetNumberofCrosswordsa proper class method, it should be decorated with@classmethodand take aclsparameter as its first argument.

1. ThegetNumberofCrosswords()method should be decorated with@classmethod.

This is because thegetNumberofCrosswords()method is intended to access the class-level variablenumberofcrosswords, 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@classmethoddecorator to the function.

Here's an example of how to definegetNumberofCrosswords()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@classmethoddecorator, and theclsparameter is used to access the class-level variablenumberofcrosswords.

Official Python documentation on Classes:https://docs.python.org/3/tutorial/classes.html

Answer : A, D

1. 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.

2. 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.

3. 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.

4. 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.

1: https://en.wikipedia.org/wiki/Network_socket2: https://www.geeksforgeeks.org/socket-in-computer-network/3: https://www.tutorialspoint.com/what-is-a-network-socket-computer-networks

Answer : D

The correct answer isD. 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 theMyClassclass. When the inequality operator is used to compare two instances ofMyClass, the__ne__method is called to determine whether the two instances are unequal.

Answer : A

In the given code snippet, therepeatfunction is a decorator that takes an argumentnum_timesspecifying the number of times the decorated function should be called. Therepeatfunction returns an inner functionwrapper_repeatthat takes a functionfuncas an argument and returns another inner functionwrapperthat callsfuncnum_timestimes.

The provided code snippet represents an example of a decorator that accepts its own arguments. The@decorator_functionsyntax is used to apply thedecorator_functionto thesome_functionfunction. Thedecorator_functiontakes an argumentarg1and defines an inner functionwrapper_functionthat takes the original functionfuncas its argument. Thewrapper_functionthen returns the result of callingfunc, along with thearg1argument passed to thedecorator_function.

Here is an example of how to use this decorator withsome_function:

@decorator_function('argument 1')

def some_function():

return 'Hello world'

Whensome_functionis called, it will first be passed as an argument to thedecorator_function. Thedecorator_functionthen adds the string'argument 1'to the result of callingsome_function()and returns the resulting string. In this case, the final output would be'Hello world argument 1'.

Official Python documentation on Decorators:https://docs.python.org/3/glossary.html#term-decorator