PCPP-32-101 PCPP1 – Certified Professional in Python Programming 1 Questions and Answers

The correct answer is C. The logging format string requires the logger name first, followed immediately by the log level in square brackets, then the timestamp in square brackets, followed by a colon and the message. The default value produced by %(asctime)s includes milliseconds separated by a comma, such as 2019-10-19 18:21:35,407. Option C exactly matches that structure: root is the logger name, [CRITICAL] is the level name, [2019-10-19 18:21:35,407] is the timestamp, and Invalid argument is the message. Options B and D use colon separators instead of brackets, while option A omits the milliseconds required by the default asctime format.

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.

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 A. In Tkinter event handling, an event object contains information about the event that occurred. One of its useful attributes is widget, which refers to the actual widget object that caused or received the event. This is not merely the widget’s name as text; it is a reference to the widget instance itself. That means the event handler can inspect or manipulate the widget directly, for example by reading its configuration or changing its displayed value. Option B and option D are incorrect because they describe a name, not an object reference. Option C is unrelated, since run() is not part of Tkinter event object semantics.

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

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.

The issue is method resolution order, commonly called MRO. In Python multiple inheritance, the interpreter must build a consistent linear inheritance path for the class. Here, B already inherits from A, meaning B must appear before A in the resolution order. However, class C(A, B) asks Python to resolve A before B. These two requirements conflict, so Python cannot create a valid MRO for class C. This results in a TypeError related to inconsistent method resolution order. The absence of an __init__() method is not a problem because Python supplies a default initializer. Also, C can inherit run() if the inheritance order is valid.

The dump() method in the xml.etree.ElementTree module allows you to output a debug representation of an XML tree to a file or standard output. This method is useful for analyzing the structure of the tree and tracking down errors.

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 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 to format 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.

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  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.

If purple can be obtained from mixing red and blue, which color codes represent the two ingredients? Select two answers)

A. #FFFFFF

B. #0000FF

C. #FF0000

D. #000000

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'] .

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.

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.

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 browser 1 .

B. 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 not 2 .

C. 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 not 3 .

D. 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 over 4 .