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Apple App Development with Swift Certified User Sample Questions:

1. Review the code.
var capitalCities = [ " USA " : " Washington D.C. " , " Spain " : " Madrid " , " Peru " : " Lima " ] Which two statements add the capital city of " Italy " to the dictionary? (Choose 2.)

A) capitalCities[ " Italy " ] = " Rome "
B) capitalCities[ " Rome " ] = " Italy "
C) capitalCities = capitalCities + [ " Italy " : " Rome " ]
D) capitalCities.updateValue( " Rome " , forKey: " Italy " )
E) capitalCities.append([ " Italy " : " Rome " ])

2. Review the code snippet.

The code snippet does not compile.
Which two actions will fix the errors? (Choose 2.)

A) Chang the type of unitPrice from Double to Int.
B) Change totalCost from let to var to make it mutable.
C) Change the initial value of totalCost from o to 0.0.
D) Change the type of quantity from int to Double .
E) Change shipping from let to var to make it mutable.

3. Review the code snippet.

What value does the code output?

4. Review the code.

You need to add the word " Great! " to the Capsule shape.
Complete the code by typing in the boxes.

5. Which property wrapper allows you to read data from the system or device settings?

A) @Binding
B) @Environment
C) @StateObject
D) @State

Solutions: