Practice Free PCPP-32-101 PCPP1 – Certified Professional in Python Programming 1 Exam Questions Answers With 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.

The correct answers are C and D. The json.loads() function is used for JSON deserialization. It accepts a JSON-formatted string, bytes, or bytearray and converts that serialized JSON data into an equivalent Python object. For example, a JSON object becomes a Python dictionary, a JSON array becomes a Python list, JSON strings become Python strings, and JSON numbers become Python numeric values. Option A describes json.dumps(), which takes Python data and serializes it into JSON text. Option B is also incorrect because returning a JSON string is the job of json.dumps(), not json.loads(). Therefore, json.loads() takes JSON text as input and returns a Python entity.

The correct answers are B and D. In Python’s csv module, a normal csv.reader object reads each CSV row as a list of strings, so option B is true. A csv.DictReader object reads each row into a dictionary, using field names as keys, so option D is also true. Option A is false because DictReader does not always take headers from the first row; field names can be provided explicitly through the fieldnames argument. Option C is false because DictWriter requires field names so it knows which dictionary keys correspond to CSV columns and in what order they should be written. This distinction between row lists and row dictionaries is central to CSV processing.

The correct answer is B. The ConfigParser.sections() method returns a list of section names, but it does not include the special DEFAULT section. Therefore, even though config['DEFAULT'] = {} is present, DEFAULT is excluded from the printed result. The code then creates three regular sections: mysql, postgresql, and redis. Assigning config['redis'] = config['postgresql'] creates or updates a separate section named redis using the values from the postgresql section; it does not duplicate the section name postgresql in the section list. Therefore, the output contains only the normal section names: ['mysql', 'postgresql', 'redis'] .

The correct answers are B and D. In Tkinter’s Canvas widget, there is no built-in method named create_shape() or create_triangle_shape(). A triangle can be drawn either with create_line() by connecting three line segments between three coordinate points, or with create_polygon() by providing three vertices. create_polygon() is the more direct method because a triangle is a polygon with three sides, and Tkinter can render it as a filled or outlined shape. create_line() is also valid when the programmer manually draws the three sides and closes the shape. Therefore, the valid Canvas methods for producing a triangle are create_line() and create_polygon().

The correct answer is D because var1 is a class variable defined directly inside the Sword class body. Class variables belong to the class object itself and can be accessed or updated by qualifying them with the class name, such as Sword.var1 = 'blade'. The snippet does not raise an AttributeError or ValueError; creating s1 = Sword() correctly calls __init__() and assigns the instance attribute self.name. Option C is not correct in this context because cls is only automatically available inside a class method when declared as the first parameter. Outside such a method, cls is just an undefined name unless explicitly assigned.

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.

The correct answer is A because { 1 } is not valid JSON syntax. In JSON, curly braces represent an object, but an object must contain name-value pairs. Property names must be strings enclosed in double quotation marks, followed by a colon and a value, such as {"id": 1}. The expression { 1 } contains a numeric value inside braces without a property name or colon, so it cannot be parsed as a JSON object. It is also not an array, because JSON arrays use square brackets, such as [1]. It is not an integer either, because the braces change the syntax. Therefore, this JSON string is erroneous.

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.

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 .

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.

A. 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.

D. 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.

B. 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.

C. 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.

The correct answer is C. The code creates an XML root element named data and then adds two child elements named car. Each car element receives a brand attribute, one with the value Audi and the other with the value Volkswagen. The statement tree.write('cars.xml', 'UTF-8', True) writes the XML document using UTF-8 encoding and explicitly enables the XML declaration through the third argument. Because the XML declaration is enabled, the output begins with < ?xml version='1.0' encoding='UTF-8'? > . The generated XML body then contains the data element with two self-closing car child elements. Options without the encoding declaration are therefore incomplete.

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.

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 .