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Apple App Development with Swift Certified User Sample Questions:

1. Which code correctly creates a size 300 rectangular Image View with rounded corners that displays the entire image, regardless of size?

A)

B)

C)

D)

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

A) You can run an app on your phone and get debug information in Xcode.
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) Your phone must always be physically attached to your Mac to run your apps from Xcode on it.
E) You need a paid Apple Developer account in order to run your app on your phone.

3. What is the code snippet an example of?

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

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

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

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

Solutions: