PCPP-32-101 PCPP1 – Certified Professional Python Programmer Level 1 Practice Questions

Prioritizing code performance over all other considerations.

Using complex, powerful language features whenever possible to reduce lines of code.

Designing APIs and language syntax to guide developers towards a single, clear, and idiomatic solution for common problems.

Forbidding the use of multiple programming paradigms (e.g., functional and object-oriented) within the same project.

The Factory pattern, implemented by creating a separate LoggerFactory class.

The Singleton pattern, implemented by overriding the __new__ special method.

The Decorator pattern, implemented by wrapping the Logger class with a function.

The Abstract Factory pattern, implemented by using an abstract Logger base class.

Immediately call socket.close() after sendall() returns.

Call socket.shutdown(socket.SHUT_WR) and then wait in a loop calling socket.recv() until it returns an empty byte string.

Insert a time.sleep(1) before calling socket.close() to give the network time to deliver the data.

There is no way to be certain; TCP does not provide this guarantee.

class IntList(list):
def append(self, value):
if not isinstance(value, int):
raise TypeError('Only integers can be added.')
super().append(value)

class IntList(list):
def __add__(self, value):
if not isinstance(value, int):
raise TypeError('Only integers can be added.')
self.append(value)

class IntList(list):
def append(self, value):
if type(value) is not int:
return
list.append(self, value)

class IntList(list):
def __init__(self, value):
if isinstance(value, int):
super().append(value)

# parent is the Toplevel window
theme_var = tk.StringVar(value='Dark')
tk.Radiobutton(parent, text='Light', variable=theme_var, value='Light').pack()
tk.Radiobutton(parent, text='Dark', variable=theme_var, value='Dark').pack()
tk.Radiobutton(parent, text='System', variable=theme_var, value='System').pack()

# parent is the Toplevel window
tk.Radiobutton(parent, text='Light', value=1).pack()
tk.Radiobutton(parent, text='Dark', value=2).pack()
tk.Radiobutton(parent, text='System', value=3).pack()

# parent is the Toplevel window
light_var = tk.StringVar()
dark_var = tk.StringVar()
system_var = tk.StringVar()
tk.Radiobutton(parent, text='Light', variable=light_var).pack()
tk.Radiobutton(parent, text='Dark', variable=dark_var).pack()
tk.Radiobutton(parent, text='System', variable=system_var).pack()

# parent is the Toplevel window
theme_var = tk.StringVar()
tk.Radiobutton(parent, text='Light', command=lambda: theme_var.set('Light')).pack()
tk.Radiobutton(parent, text='Dark', command=lambda: theme_var.set('Dark')).pack()
tk.Radiobutton(parent, text='System', command=lambda: theme_var.set('System')).pack()

Inheritance and Encapsulation

Composition and Polymorphism

Abstraction and Inheritance

Metaprogramming and Composition

A single function that accepts the decorator's arguments and the decorated function.

A class with an __init__ method for the decorated function and a __call__ method for the decorator's arguments.

Three nested functions: the outer for the decorator's arguments, the middle to accept the function to be decorated, and the inner to serve as the wrapper.

Two nested functions: the outer function accepts both the decorator's arguments and the function, and the inner function is the wrapper.

To replace the original exception exc with a new ConnectionError, discarding the original traceback.

To create an explicitly chained exception, where the ConnectionError is presented as the direct cause of the original exception exc.

To create an implicitly chained exception, where the original exception exc is stored in the new exception's __context__ attribute.

To create an explicitly chained exception, where the original exception exc is preserved in the __cause__ attribute and included in the traceback.

requests.get('https://api.example.com/users/123', data={'X-API-Key': 'secret'})

requests.get('https://api.example.com/users/123', headers={'X-API-Key': 'secret'})

requests.get('https://api.example.com/users/123', params={'X-API-Key': 'secret'})

requests.get('https://api.example.com/users/123', auth={'X-API-Key': 'secret'})

if len(my_list) == 0:

if my_list == []:

if not my_list:

if my_list is []: