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Apple App Development with Swift Certified User Sample Questions:

1. Complete the code by selecting the correct option from each drop-down list to create the following screen.

Note: You will receive partial credit for each correct answer.

2. Review the code snippet.

The " faces " dictionary contains emojis and their descriptions.
Which code will create an array named " emo)is " that will copy all the emojis from the " faces " dictionary?

A) let emojis List(faces.values())
B) let emojis - List(faces.koys())
C) let emojis - Array(faces.values)
D) let emojis = Array(faces.keys)

3. Review the code snippet and then predict the output.

A) Total count: 11
B) Total count: 20
C) Total count: 10
D) Total count: 9

4. Why does the initializer for the following struct need the keyword self?

A) self is used to indicate to the reader that the parameter is being referenced.
B) self is needed to distinguish between the property and the parameter with the same name.
C) self is only needed when the property does not have a default value.
D) self is always needed when you are setting properties in an initializer.

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

Solutions: