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Focused questions for skill assessment

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Free Sample Questions for Kotlin

Which snippet correctly shows setting the variable max to whichever variable holds the greatest value, a or b, using idiomatic Kotlin?

Val max3 = a.max(b) (Extension Function is One of the idiomatic Solutions in Kotlin)

Val max = a > b ? a : b

Val max = if (a > b) a else b

If (a > b) max = a else max = b

Answer:
Val max3 = a.max(b) (Extension Function is One of the idiomatic Solutions in Kotlin)

You want to know each time a class property is updated. If the new value is not within range, you want to stop the update. Which code snippet shows a built-in delegated property that can accomplish this?

Delegates.vetoable()

Delegates.cancellable()

Delegates.observer()

Delegates.watcher()

Answer:
Delegates.vetoable()