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Apple App Development with Swift Certified User Sample Questions:

1. What is the code snippet an example of?

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

2. Which two statements about building an app are true? (Choose 2.)

A) Your phone must always be physically attached to your Mac to run your apps from Xcode on it.
B) You can run your app in the simulator with Generic iOS Device chosen.
C) You can preview a View in the Canvas without running your app.
D) You can run an app on your phone and get debug information in Xcode.
E) You need a paid Apple Developer account in order to run your app on your phone.

3. Review the code.
Note: You might need to scroll to see the entire block of code.

A breakpoint is set on line 3. When the application is run. it will stop at line 3. You need to debug the code.
Drag each debugging control from the left to the correct instruction on the right. You will receive partial credit for each correct answer

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

5. For each statement about Navigation in SwiftUI. select True or False.

Solutions: