Tests foundational and advanced knowledge of the Rust programming language, including ownership, borrowing, lifetimes, type system mechanics, and concurrency primitives.
Scorer: Factuality
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| # | score | model | cost price | ttft | total tok |
|---|---|---|---|---|---|
| 1 | 100% | kwaipilot/kat-coder-pro-v2.5 | $0.00087 $0.74 / $2.96 per 1M | 3.71s | 372.1 |
| 2 | 100% | qwen/qwen3.7-max | $0.00132 $1.48 / $4.42 per 1M | 0.97s | 366.8 |
| 3 | 100% | gpt-5.5-pro | $0.01270 $30.00 / $180.00 per 1M | 0.53s | 149.2 |
Prompts
- How does Rust handle dynamic dispatch when using trait objects like `&dyn Trait`? A) By using a fat …
- In Rust, which smart pointer allows multiple immutable owners of the same heap-allocated value in a …
- What happens when a variable goes out of scope in Rust if its type implements the Drop trait? A) The…
- What is the effect of applying the `?` operator to an `Option<T>` expression inside a function retur…
- What is the primary difference between the `String` and `&str` types in Rust? A) `String` is allocat…
- What is the purpose of the lifetime elision rules in Rust function signatures? A) To eliminate all h…
- Which of the following describes the fundamental rule of borrowing in Rust? A) You can have any numb…
- Which of the following operations requires an `unsafe` block in standard Rust? A) Reading a private …
- Which standard library type enables interior mutability by enforcing borrowing rules at runtime rath…
- Which trait in Rust indicates that ownership of the type implementing it can be transferred safely a…