Rust quiz

Test your Rust knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What does `match` require?

1. What does `match` require?
2. What does the `mut` keyword in `let mut x` allow that plain `let` does not?
3. What is `Option<T>`?
4. What is the difference between `String` and `&str`?
5. A function `fn add(a: i32, b: i32) -> i32 { a + b }` — what makes `a + b` the return value?
6. How do you create a growable vector and push two elements?
7. What is a `Box<T>`?
8. What does this iterate: `for x in 0..5 { … }`?
9. A `struct Point { x: i32, y: i32 }` is instantiated as:
10. `#[derive(Debug, Clone, PartialEq)]` does what?
11. What does `enum Color { Red, Green, Blue }` create?
12. What does the `?` operator do at the end of an expression?

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