PCPP1 Graphical User Interface Programming Practice Question
You have a Button widget and want to trigger a function named 'process_data' when the user clicks it. Which is the standard way to associate the function with the button?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
button = Button(root, command=process_data)
The 'command' parameter is the standard way to bind a callback function to a button click event.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
button = Button(root, event=process_data)
Why it's wrong here
There is no 'event' parameter for the Button constructor.
- ✗
button.bind('<Button-1>', process_data)
Why it's wrong here
While this works, 'command' is the preferred standard way for buttons, whereas bind is for low-level events.
- ✓
button = Button(root, command=process_data)
Why this is correct
The 'command' parameter is designed specifically for triggering functions on button clicks.
- ✗
button.set_action(process_data)
Why it's wrong here
Tkinter widgets do not have a set_action method.
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Last reviewed August 2026 · checked against the official Python Institute exam blueprint
This PCPP1 practice question is part of Courseiva's free Python Institute certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCPP1 exam.