Swift Function and Closures Quiz

Test your knowledge and understanding of Swift functions and closures.

1. 
What is a function in Swift?

2. 
What term is used for the values a function can accept?

3. 
In Swift, what is a method?

4. 
How is a Swift function declared?

5. 
What is the purpose of the func keyword in Swift function declarations?

6. 
What is the function signature composed of?

7. 
How would you declare a function that does not return a result? (select all that apply)

8. 
What does the 'in' keyword signify in a closure expression?

9. 
How can you handle multiple return values from a Swift function? (select all that apply)

10. 
How are default parameter values declared in a Swift function?

11. 
What is the role of variadic parameters in Swift functions?

12. 
How can you assign a function to a constant in Swift?

13. 
What is the data type of a function that accepts an Int and a Double and returns a String?

14. 
Which Swift of the following is used to declare a closure?

15. 
What is a key difference between a function and a closure in Swift?

16. 
What is a closure in the context of Swift programming?

17. 
When calling a function with an in-out parameter, what prefix is required for the argument?

18. 
In a closure expression, how do you refer to the first argument?

19. 
Which type of function can be used as a parameter to another function in Swift?

20. 
How do you specify a closure’s return type?

21. 
What is the default behavior of parameters in Swift functions if not explicitly labeled?

22. 
How do you define a closure with no parameters and no return value in Swift?

23. 
How are closures often used in Swift?

24. 
What is the syntax for defining a closure with a specific return type?

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