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The PCPP1 exam covers a wide range of topics, including Python basics, data types, control structures, functions, modules, and libraries. PCPP-32-101 exam is designed to test the candidate's knowledge and practical skills in Python programming. PCPP1 - Certified Professional in Python Programming 1 certification exam is available in two formats - online proctored and on-site proctored. The online proctored exam can be taken from anywhere with a reliable internet connection, while the on-site proctored exam requires the candidate to visit an authorized testing center. The PCPP1 certification is a valuable credential for individuals who want to pursue a career in software development, data analysis, machine learning, or any other field that requires proficiency in Python programming.
NEW QUESTION # 18
Select the true statements about the sqlite3 module. (Select two answers.)
- A. The execute method is provided by the Cursor class
- B. The fetchalt method returns None when no rows are available
- C. The fetchone method returns None when no rows are available
- D. The execute method allows you to perform several queries at once
Answer: A,C
Explanation:
Explanation
The execute method is provided by the Cursor class
This statement is true because the execute method is one of the methods of the Cursor class in the sqlite3 module. The Cursor class represents an object that can execute SQL statements and fetch results from a database connection. The execute method takes an SQL query as an argument and executes it against the database. For example, cur = conn.cursor (); cur.execute ("SELECT * FROM table") creates and executes a cursor object that selects all rows from a table.
The fetchone method returns None when no rows are available
This statement is true because the fetchone method is another method of the Cursor class in the sqlite3 module.
The fetchone method fetches the next row of a query result set and returns it as a single tuple or None if no more rows are available. For example, row = cur.fetchone () fetches and returns one row from the cursor object or None if there are no more rows.
NEW QUESTION # 19
Select the true statements about the connection-oriented and connectionless types of communication. (Select two answers.)
- A. 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
- B. A phone call is an example of a connection-oriented communication
- C. Connectionless communications are usually built on top of TCP
- D. Using walkie-talkies is an example of a connection-oriented communication
Answer: A,B
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 # 20
Select the true statements about the sqirte3 module. (Select two answers.)
- A. The sqlite3 module provides an interface compliant with the DB-API 2.0.
- B. The fetchall method returns an empty list when no rows are available
- C. The sqhte3 module does not support transactions.
- D. The special name memory is used to create a database in RAM.
Answer: A,D
Explanation:
Explanation
The sqlite3 module in python provides an interface compliant to the DB-API 2.0. Thus, it follows a standard performance metric that allows for consistency in database programming with python.
The special name 'memory' is used to create a database in RAM using the sqlite3 module. Thus, when you use it as the name of the database file while opening a connection, it creates a temporary database that exists only in memory.
NEW QUESTION # 21
What is ElementTree?
- A. A Python built-in module that contains functions used for parsing and creating XML data.
- B. A Python built-in module that contains functions used for creating HTML files.
- C. A Python library that contains functions and tools used for manipulating text files in GUI Programming.
- D. A Python library that contains an API used for parsing and manipulating JSON files.
Answer: A
Explanation:
Explanation
ElementTree is a Python built-in module that provides a simple and efficient API for parsing and creating XML data. It allows you to access and manipulate XML data in a very straightforward way, making it easy to write XML processing applications.
NEW QUESTION # 22
Select the true statements related to PEP 8 programming recommendations for code writing. (Select two answers:)
- A. You should write code in a way that favors the CPython implementation over PyPy, Cython. and Jython.
- B. 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.
- C. 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)).
- D. You should not write string literals that rely on significant trailing whitespaces as they may be visually indistinguishable, and certain editors may trim them
Answer: C,D
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 # 23
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,B
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 # 24
Analyze the following snippet and select the statement that best describes it.
- A. The code is erroneous as the OwnMath class does not inherit from any Exception type class
- B. The code is fine and the script execution is not interrupted by any exception.
- C. The code is an example of explicitly chained exceptions.
- D. The code is an example of implicitly chained exceptions.
Answer: C
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 # 25
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 # 26
Select the true statement about composition
- A. Composition is based on the has a relation: so it cannot be used together with inheritance.
- B. Composition allows a class to be projected as a container of different classes
- C. Composition is a concept that promotes code reusability while inheritance promotes encapsulation.
- D. Composition extends a class's capabilities by adding new components and modifying the existing ones.
Answer: B
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 # 27
Analyze the following snippet and choose the best statement that describes it.
- A. Excalibur is the value passed to an instance variable
- B. varl is the name of a global variable
- C. self. name is the name of a class variable.
- D. Weapon is the value passed to an instance variable
Answer: A
Explanation:
Explanation
The correct answer is C. Excalibur is the value passed to an instance variable. In the given code snippet, self.name is an instance variable of the Sword class. When an instance of the Sword class is created with varl = Sword('Excalibur'), the value 'Excalibur' is passed as an argument to the __init__ method and assigned to the name instance variable of the varl object.
The code defines a class called Sword with an __init__ method that takes one parameter name. When a new instance of the Sword class is created with varl = Sword('Excalibur'), the value of the 'Excalibur' string is passed as an argument to the __init__ method, and assigned to the self.name instance variable of the varl object.
NEW QUESTION # 28
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 classes, and it contains the name of a class.
- D. ___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.
Answer: C
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 # 29
If w is a correctly created main application window, which method would you use to foe both of the main window's dimensions?
- A. w. resizable ()
- B. w. f ixdim ()
- C. w. f ixshape ()
- D. w.makewindow ()
Answer: A
Explanation:
Explanation
w.resizable()
The resizable() method takes two Boolean arguments, width and height, that specify whether the main window can be resized in the corresponding directions. Passing False to both arguments makes the main window non-resizable, whereas passing True to both arguments (or omitting them) makes the window resizable.
Here is an example that sets the dimensions of the main window to 500x400 pixels and makes it non-resizable:
importtkinter as tk
root = tk.Tk()
root.geometry("500x400")
root.resizable(False, False)
root.mainloop()
References:
* Tkinter documentation: https://docs.python.org/3/library/tk.html
* Tkinter tutorial: https://www.python-course.eu/python_tkinter.php
The resizable () method of a tkinter window object allows you to specify whether the window can be resized by the user in the horizontal and vertical directions. You can pass two boolean arguments to this method, such as w.resizable (False, False), to prevent both dimensions from being changed. Alternatively, you can pass 0 or
1 as arguments, such as w.resizable (0, 0), to achieve the same effect1.
References:
1: https://stackoverflow.com/questions/36575890/how-to-set-a-tkinter-window-to-a-constant-size Other methods that can be used to control the window size are:
* w.geometry () : This method allows you to set the initial size and position of the window by passing a string argument in the format "widthxheight+x+y", such as w.geometry ("500x500+100+100")12.
* w.minsize () and w.maxsize (): These methods allow you to set the minimum and maximum size of the window in pixels, such as w.minsize (500, 500) and w.maxsize (1000, 1000)12.
* w.pack_propagate () and w.grid_propagate (): These methods allow you to enable or disable the propagation of the size of the widgets inside the window to the window itself. By default, these methods are set to True, which means that the window will adjust its size according to the widgets it contains.
You can set these methods to False or 0 to prevent this behavior, such as w.pack_propagate (0) or w.grid_propagate (0).
* w.place (): This method allows you to place the window at a specific position and size relative to its parent window or screen. You can use keyword arguments such as x, y, width, height, relx, rely, relwidth, and relheight to specify the coordinates and dimensions of the window in absolute or relative terms, such as w.place (x=0, y=0, relwidth=1, relheight=1).
References:
2: https://stackoverflow.com/questions/25690423/set-window-dimensions-in-tkinter-python-3 :
https://stackoverflow.com/questions/36575890/how-to-set-a-tkinter-window-to-a-constant-size/36576068#36576
https://www.skotechlearn.com/2020/06/tkinter-window-position-size-center-screen-in-python.html
NEW QUESTION # 30
Which of the following values can be returnedby the messagebox. askquestion () method?
- A. True and False
- B. l and o
- C. "yes" and "no"
- D. "accept:" and "cancel''
Answer: C
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 # 31
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. The getNumberofCrosswords () method should be decorated With @classmethod.
- C. The gexNumberOfcrosswords () and issrived methods should be decorated with @classzoechod.
- D. There is only one initializer, so there is no need for a class method.
Answer: B
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 # 32
What will happen if the mamwindow is too small to fit all its widgets?
- A. The window will be expanded.
- B. Some widgets may be invisible
- C. An exception will be raised.
- D. The widgets will be scaled down to fit the window's size.
Answer: B
Explanation:
Explanation
If the main window is too small to fit all its widgets, some widgets may be invisible. So, the correct answer is Option A.
When a window is not large enough to display all of its content, some widgets may be partially or completely hidden. The window will not automatically expand to fit all of its content, and no exception will be raised. The widgets will not be automatically scaled down to fit the window's size.
If the main window is too small to fit all its widgets, some of the widgets may not be visible or may be partially visible. This is because the main window has a fixed size, and if there are more widgets than can fit within that size, some of them will be outside the visible area of the window.
To avoid this issue, you can use layout managers such as grid, pack, or place to dynamically adjust the size and position of the widgets as the window changes size. This will ensure that all the widgets remain visible and properly arranged regardless of the size of the main window.
References:
* https://www.tkdocs.com/tutorial/widgets.html#managers
* https://www.geeksforgeeks.org/python-tkinter-widgets/
* https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/introduction.html
NEW QUESTION # 33
Select the true statement related to PEP 257.
- A. String literals that occur immediately after a simple assignment at the top level of a module are called complementary docstrings
- B. String Iiterals that occur in places other than the first statement in a module, function, or class definition can act as documentation They are recognized by the Python bytecode compiler and are accessible as runtime object attributes
- C. Attribute docstrings and Additional docstrings are two types of extra docstrings that can be extracted by software tools.
- D. String literals that occur immediately after another docstring are called attribute docstrings.
Answer: C
Explanation:
Explanation
The true statement related to PEP 257 is Option B. According to PEP 257, string literals occurring elsewhere in Python code may also act as documentation. They are not recognized by the Python bytecode compiler and are not accessible as runtime object attributes (i.e. not assigned to doc), but two types of extra docstrings may be extracted by software tools: String literals occurring immediately after a simple assignment at the top level of a module, class, or init method are called "attribute docstrings". String literals occurring immediately after another docstring are called "additional docstrings"1.
NEW QUESTION # 34
In the JSON processing context, the term serialization:
- A. names a process in which a JSON string is turned into Python data.
- B. names a process in which a JSON string is remodeled and transformed into a new JSON string
- C. names a process in which Python data is turned into a JSON string.
- D. refers to nothing, because there is no such thing as JSON serialization.
Answer: C
Explanation:
Explanation
In the JSON processing context, the term serialization: A. names a process in which Python data is turned into a JSON string.
Serialization refers to the process of converting a data object, such as a Python object, into a format that can be easily transferred over a network or stored in a file. In the case of JSON, serialization refers to converting Python data into a string representation using the JSON format. This string can be sent over a network or stored as a file, and later deserialized back into the original Python data object.
NEW QUESTION # 35
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 isinstanceO function
- B. The = operator
- C. The id () function
- 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 # 36
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Python Institute PCPP-32-101 (PCPP1 - Certified Professional in Python Programming 1) Exam is a certification program that recognizes professionals who have demonstrated their expertise in Python programming. PCPP-32-101 exam is intended for individuals who have a strong understanding of Python basics, data structures, functions, modules, and object-oriented programming concepts. The PCPP1 certification validates that the individual has the skills and knowledge needed to write Python programs and applications.
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