PCPP1 Practice Test 1 — 10 Questions

Question 1

What is the primary function of the 'bg' parameter in a widget configuration?

Accepted Answer

Sets the background color.. The 'bg' (or background) parameter sets the background color of the widget.

Answer

Sets the button group.

Answer

Sets the border group.

Answer

Sets the base grid.

Question 2

You are debugging a legacy application and need to ensure that resources like file handles are always closed. Which construct is preferred?

Accepted Answer

Use a context manager with the 'with' statement.. The 'with' statement (context manager) ensures that cleanup code is executed even if an exception occurs.

Answer

Wrap the file operation in a try-except block.

Answer

Manually call file.close() in a finally block.

Answer

Rely on the garbage collector to close the handle.

Question 3

You are writing a library that expects a custom exception. Which practice aligns best with Python's exception handling hierarchy?

Accepted Answer

Inherit from Exception.. Custom exceptions should inherit from the built-in Exception class to ensure they are catchable by standard error handlers.

Answer

Use a mixin class without inheritance.

Answer

Inherit from StandardError.

Answer

Inherit from BaseException.

Question 4

Which TWO of the following are valid conventions for naming in Python according to PEP 8?

Accepted Answer

Classes: PascalCase. Functions should use snake_case, and classes should use PascalCase.

Answer

Constants: camelCase

Answer

Modules: PascalCase

Answer

Functions: camelCase

Question 5

What is the correct way to specify the title of a Tkinter window?

Accepted Answer

root.title('My App'). The title() method is called on the root window object.

Answer

root.set_title('My App')

Answer

root.name = 'My App'

Answer

root.set_header('My App')

Question 6

In a team environment, which PEP 8 guideline should be applied to maintain consistent indentation when mixing spaces and tabs?

Accepted Answer

Use spaces exclusively for indentation.. PEP 8 states that spaces are the preferred indentation method over tabs to ensure cross-platform consistency.

Answer

Use tabs exclusively, as they are more efficient for file size.

Answer

Always use a combination of tabs and spaces to allow personal editor configuration.

Answer

Default to the indentation used by the first author of the module.

Question 7

Which THREE practices are recommended when handling external libraries?

Accepted Answer

Use a virtual environment for every project.. You should use virtual environments, pin your dependencies, and document your requirements.

Answer

Install libraries globally.

Answer

Import all libraries at the very end of the file.

Question 8

Which THREE elements are essential for a good Python docstring?

Accepted Answer

A detailed description of the logic.. A summary line, a blank line, and a detailed description are standard.

Answer

A list of all possible variable types in the code.

Answer

The full source code of the function.

Question 9

Which of the following is the correct way to handle whitespace around an operator according to PEP 8?

Accepted Answer

x = y + z. PEP 8 dictates surrounding operators with a single space on both sides.

Answer

x= y +z

Answer

x  =  y  +  z

Answer

x=y+z

Question 10

Which TWO of the following events are commonly bound in Tkinter for mouse interaction?

Accepted Answer

. (click) and (mouse over) are standard mouse events.

Answer

<Quit>

Answer

Answer