Why structs are preferred in Swift - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a struct named Person with a name property.

Swift

struct [1] {
    var name: String
}

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

APerson

Bclass

Cfunc

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' instead of the struct name.

Using 'func' or 'var' which are not valid struct names.

The keyword Person is the name of the struct. We use struct to declare it.

2fill in blank

medium

Complete the code to create a new instance of the struct Person.

Swift

let person = [1](name: "Alice")

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

APerson

BPerson()

Cperson

Dstruct

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Person()' with parentheses inside the code incorrectly.

Using 'struct' keyword instead of the struct name.

To create an instance, use the struct name Person followed by parentheses with parameters.

3fill in blank

hard

Fix the error in the code to correctly copy a struct instance.

Swift

var person1 = Person(name: "Bob")
var person2 = person1
person2.name = [1]

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

Aperson2.name

Bperson1.name

C"Alice"

DPerson.name

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning from person1.name which does not change the name.

Using Person.name which is invalid syntax.

Assigning a new string value like "Alice" to person2.name changes only person2 because structs are copied.

4fill in blank

hard

Fill both blanks to create a struct with a method that returns a greeting.

Swift

struct Greeter {
    var name: String
    func [1]() -> String {
        return "Hello, \([2])!"
    }
}

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

Agreet

Bname

CsayHello

Dself

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'sayHello' as method name but not matching the blank order.

Using 'self' instead of the property name inside the string.

The method is named greet and it returns a greeting using the name property.

5fill in blank

hard

Fill all three blanks to create a struct with a computed property that returns the full name.

Swift

struct User {
    var firstName: String
    var lastName: String
    var fullName: String {
        return [1] + " " + [2]
    }
    func printName() {
        print([3])
    }
}

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

AfirstName

BlastName

CfullName

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'name' which is not defined.

Printing 'firstName' or 'lastName' instead of 'fullName'.

The computed property fullName combines firstName and lastName. The printName method prints fullName.