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Apple App Development with Swift Certified User Sample Questions:

1. 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.

2. Complete the code that will add the BlueView to the NavigationStack and present the RedView modally.

|Complete the code by typing in the boxes.

3. What is the code snippet an example of?

A) Force unwrapping
B) Implicitly unwrapped optional
C) Optional binding
D) Optional chaining

4. Review the code snippet.

Which statement completes the code snippet so that:
* The lastReleaseDate remains the same when nextApplePhone.releaseDate is nil.
* The lastReleaseDate updates to the nextApplePhone.releaseDate when nextApplePhone.releaseDate is NOT nil.

A) nextApplePhone.releaseDate : lastReleaseDate
B) lastReleaseDate : nextApplcPhone.rcleaseDate!
C) nextApplePhone.releaseDate! : lastReleaseDate
D) lastReleaseDate : nextApplePhone.releaseDate

5. Review the code snippet.

What is the output from each print statement?

Solutions: