Free Python Institute PCPP-32-101 Practice Exam with Questions & Answers | Set: 2

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.

According to PEP 8, Python's official style guide, line breaks before binary operators produce more readable code, especially in code blocks with long expressions. This is stated in several sources (1,2,6,8) and is a widely accepted convention.

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 because cls is the conventional first parameter name used in class methods. A class method is defined with the @classmethod decorator, and Python automatically passes the class itself as the first argument when the method is called. This is similar to how self represents the instance in instance methods, but cls represents the class object, not an individual object. Static methods are different because they receive neither self nor cls automatically; they behave like regular functions placed inside a class namespace. Option A is incorrect because a class instance is conventionally referenced by self, not cls. Option D is unrelated to Python’s method model.

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.

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

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 .

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.

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.

Option B is true because the  unbind()  method is invoked from within a widget’s object  1 .

Option D is true because the  unbind()  method needs the event name as an argument  1 .

The  unbind()  method in Tkinter is used to remove a binding between an event and a function. It can be invoked from within a widget's object when a binding is no longer needed. The method requires the event name as an argument to remove the binding for that specific event. For example:

button = tk.Button(root, text="Click me")

button.bind(" < Button-1 > ", callback_function) # bind left mouse click event to callback_function

button.unbind(" < Button-1 > ") # remove the binding for the left mouse click event