Kotlin Beginner Quiz 4

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Quiz 4
1. Which operator is used for structural equality?
2. Which operator is used for referential equality?
3. What is the default visibility modifier in Kotlin?
4. What is a 'safe cast' in Kotlin?
5. Which keyword is used to throw an exception?
6. Can you create an instance of an abstract class?
7. Can Kotlin interfaces contain method implementations?
8. Which class type is used for a set of fixed constant values?
9. Which keyword is optional unless the constructor has visibility modifiers?
10. Is Kotlin fully interoperable with Java?
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