💻 Computer Science & IT

Rust fundamentals

Ownership, borrowing, lifetimes and error handling — why Rust rejects your code, and why it is right to.

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Question 1 of 8

In Rust, how many owners can a value have at one time?

Question 2 of 8

The borrow checker allows, at any one moment:

Question 3 of 8

`Result<T, E>` is used for:

Question 4 of 8

What does the `?` operator do in a function returning `Result`?

Question 5 of 8

A `String` differs from `&str` in that `String` is:

Question 6 of 8

Lifetimes exist to:

Question 7 of 8

`unsafe` in Rust means:

Question 8 of 8

Which trait pair makes a type safe to send between and share across threads?

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