Question 11

Match the lines of code with the the Swift language features being used.

Choose the most correct match.

var age = user?.age

[ Choose ] Range Operator and Subscripts Range Operator Optional Chaining Subscripts Optional Chaining and Nil-Coalescing Operator Nil-Coalescing Operator

var color = colorSetting ?? defaultColor

[ Choose ] Range Operator and Subscripts Range Operator Optional Chaining Subscripts Optional Chaining and Nil-Coalescing Operator Nil-Coalescing Operator

let cover = book?.cover ?? blankCover

[ Choose ] Range Operator and Subscripts Range Operator Optional Chaining Subscripts Optional Chaining and Nil-Coalescing Operator Nil-Coalescing Operator

Question 12

Swift enumerations can be nested. An enumeration case can be an enumeration.

True

False

Question 13

Enumerations in Swift can define initializers to provide an initial case value.

True

False

Question 14

What Swift keyword is used to define the values for an enumeration?

Example values would be vertical and horizontal for the Orientation enumeration.

Question 15

Given that user is an User optional type and User has a property called name:

var name = user?.name

Which of the following is used in the Swift code?

Nil-Coalescing Operator

Optional Chaining

Range Operator

Subscripts