PCPP1 Graphical User Interface Programming Practice Question
You want to bind a function 'on_click' to a left mouse button click on a Button widget. Which event sequence string is correct?
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-1>
The event sequence '<Button-1>' corresponds to the primary (left) mouse button.
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-1>
Why this is correct
<Button-1> represents the left mouse click.
- ✗
<Mouse-1>
Why it's wrong here
There is no <Mouse-1> event.
- ✗
<Left-Click>
Why it's wrong here
This is not a valid Tkinter event string.
- ✗
<Click-1>
Why it's wrong here
There is no <Click-1> event.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.