Rust Ownership Practice (Interactive)
Intuition
Learning through practice: Practice problems are like training drills — they help you apply knowledge and identify areas that need more study.
Why it matters: Regular practice builds confidence and reveals patterns in how concepts are tested. Each problem reinforces key programming concepts.
The key insight: Making mistakes during practice is valuable — each error points to a concept that needs clarification.
Rust — Ownership Practice
8 auto-graded practice problems covering Rust ownership, lifetimes, references, and smart pointers. Select an answer, submit, and review the explanation.
Ownership
Lifetimes
References
Smart Pointers
Borrowing
Lifetimes
Trait Objects
Smart Pointers
Move Semantics
Trait Objects and Generics
Enums and Pattern Matching
Common Mistakes
Assuming Copy types are moved: Primitive types like i32 and bool implement Copy and are copied, not moved. But structs and String are moved by default. Forgetting which types copy vs move causes confusion.
Confusing Box, Rc, and Arc: Box is single-owner heap allocation; Rc is single-threaded shared ownership; Arc is multi-threaded shared ownership. Using the wrong one causes compile errors or data races.
Forgetting that push may reallocate: Calling push on a Vec while holding an immutable reference to its contents invalidates the reference. Rust prevents this at compile time to avoid dangling pointers.
Cross-References
- Rust Basics: Core Rust language features including syntax, control flow, and functions.
- Rust Traits: Trait definitions, implementations, and generic constraints.
- Rust Concurrency: Threads, channels, and async/await patterns.
- C++ Pointers: Manual memory management for comparison with Rust’s ownership model.
- Go Basics: Simpler memory model with garbage collection for comparison.
- Rust Book: Official Rust documentation and tutorials.