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Swift Pertanyaan dan Jawaban Wawancara

Test your skills through the online practice test: Swift Quiz Online Practice Test

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Ques 6. Explain optionals in Swift.

Optionals are a type in Swift that represents either a wrapped value or nil, indicating the absence of a value.

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Ques 7. What is the difference between 'let' and 'var' in Swift?

'let' is used to declare constants, and 'var' is used to declare variables.

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Ques 8. What is a closure in Swift?

A closure is a self-contained block of functionality that can be passed around and used in your code.

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Ques 9. Explain the difference between a value type and a reference type in Swift.

A value type is copied when it's assigned to a new variable or passed as an argument, while a reference type refers to the same instance of the data.

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Ques 10. What is ARC (Automatic Reference Counting) in Swift?

ARC is a memory management feature in Swift that automatically tracks and manages the memory usage of your app.

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