Why traits are used in Rust - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a trait named Printable.

Rust

trait Printable {
    fn [1](&self);
}

Drag options to blanks, or click blank then click option'

Aprint

Bdisplay

Coutput

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Using method names that are not conventional for printing.

The trait method is commonly named print to indicate printing behavior.

2fill in blank

medium

Complete the code to implement the Printable trait for struct Book.

Rust

struct Book {
    title: String,
}

impl Printable for Book {
    fn [1](&self) {
        println!("Book: {}", self.title);
    }
}

Drag options to blanks, or click blank then click option'

Adisplay

Bprint

Cshow

Doutput

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different method name than the trait defines.

The method name must match the trait definition, which is print.

3fill in blank

hard

Fix the error in the code by completing the trait bound syntax.

Rust

fn print_item<T: [1]>(item: T) {
    item.print();
}

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APrintable

BDisplay

CDebug

DClone

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated traits like Display or Debug.

The function requires the generic type T to implement the Printable trait to call print().

4fill in blank

hard

Fill both blanks to create a trait and implement it for a struct.

Rust

trait [1] {
    fn print(&self);
}

struct Article {
    content: String,
}

impl [2] for Article {
    fn print(&self) {
        println!("Article: {}", self.content);
    }
}

Drag options to blanks, or click blank then click option'

APrintable

BDisplayable

DShowable

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for trait and impl.

The trait name and implementation must match exactly, here both are Printable.

5fill in blank

hard

Fill all three blanks to define a trait, implement it, and use it in a function.

Rust

trait [1] {
    fn print(&self);
}

struct Note {
    text: String,
}

impl [2] for Note {
    fn print(&self) {
        println!("Note: {}", self.text);
    }
}

fn show<T: [3]>(item: T) {
    item.print();
}

Drag options to blanks, or click blank then click option'

APrintable

DDisplay

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing trait names or using unrelated traits.

All trait references must be consistent and use Printable.