How many questions are in this quiz?

This quiz has 119 questions covering ownership, borrowing, and lifetimes in Rust.

What format are the questions in?

Each question is multiple-choice with 4 options, and there is no timer.

Can I choose the number of questions and the difficulty?

Yes. Before starting, you can select your preferred question count and choose a difficulty level (the quiz is mixed by default).

Do I need to write Rust code to take this quiz?

No. You’ll answer by selecting the best option, but many questions use short code snippets and compiler-style scenarios.

What topics show up most often?

Expect moves vs borrows, mutable aliasing rules, lifetime annotations/elision, and fixing borrow-checker errors in common patterns.

Rust Ownership & Lifetimes Quiz

About this quiz

What you’ll practice

This quiz targets the core Rust concepts that unlock safe, fast code: ownership moves, borrowing (shared vs mutable), and lifetimes. Expect scenarios that mirror real compiler messages and require you to pick the best fix.

Every question is multiple-choice with 4 options and no timer, so you can reason through each snippet carefully. You can also choose the question count and difficulty before starting to match your study session.

Common pitfalls to watch for

Many mistakes come from mixing mutable and immutable borrows, returning references to local data, or misunderstanding when a value is moved. Another frequent trap is adding lifetime annotations that “look right” but don’t reflect the actual relationships between references.

Confusing moves with copies (especially with String, Vec, and structs)
Holding a borrow across a mutation or across an iterator loop
Creating dangling references by returning refs to temporaries/locals
Overusing 'static or adding lifetimes where elision already works
Missing reborrows and the scope of a mutable borrow

How the difficulty stays balanced

Difficulty is mixed: easier items build fundamentals (moves, basic borrowing), while harder ones cover lifetime relationships, trait bounds, and tricky control-flow scopes. If you want a smoother ramp, start with easier difficulty and fewer questions, then increase length or switch to mixed once your accuracy improves.