How many questions are in this quiz?

This quiz has 128 questions on Python scopes, closures, and decorators.

No. There’s no timer, so you can take your time reading code and reasoning about scope and bindings.

What answer format does the quiz use?

Each question is multiple-choice with 4 options.

Can I choose the number of questions and difficulty?

Yes. Before starting, choose your question count and select a difficulty level; Mixed blends easy, medium, and harder items.

What topics are covered besides basic scope rules?

You’ll see LEGB lookup, global/nonlocal, closure capture, late binding, decorator patterns, and common wrapper mistakes.

Python: scopes, closures, and decorators

About this quiz

What you’ll practice

Scopes, closures, and decorators are where Python’s “it just works” can suddenly feel subtle. This quiz helps you build a reliable mental model for name resolution (LEGB), captured variables, and function-wrapping patterns.

Each question uses 4 options and there’s no timer, so you can reason carefully about execution order, bindings, and what actually gets evaluated.

Difficulty and quiz setup

Choose how many questions you want to answer before you start, and select an easier or harder difficulty if you want to focus your practice. The overall difficulty is balanced by mixing quick concept checks with code-reading items that require step-by-step tracing.

A common approach is to begin with a shorter run at Mixed difficulty, then repeat with a higher difficulty once you can predict outputs without guessing.

Common pitfalls to watch for

Confusing assignment with lookup: any assignment in a function can make a name local unless declared global/nonlocal
Late binding in closures (e.g., lambdas in loops capturing the same variable)
Forgetting to return the inner function when building closures
Writing decorators that lose function metadata (missing functools.wraps)
Misunderstanding decorator execution time: decoration happens at import/definition, not at call time

Tips for better scores

When you miss a question, rewrite the snippet in your head using explicit steps: define-time vs call-time behavior, which scope owns each name, and which object the decorator returns. With no timer and 4 options per question, treat each item like a mini-debugging session rather than a speed test.