Please help with these swift problems I will thumbs up in rating !!!!!! 1. Given

Question

Please help with these swift problems

I will thumbs up in rating !!!!!!

1. Given the following function, what is the proper way to call the function?

func add(_ x: Int, _ y: Int) -> Int {
return x + y
}

A. let result = add(x: 5, y: 6)

B. let result = add(_ x: 5, _ y: 6)

C. let result = add(Int: 5, Int: 6)

D. let result = add(5, 6)

E. let result = add(5: Int, 6: Int)

2. Given the following tuple:

let error = (errorCode: 101, message: "Invalid value.")

Is the following allowed?

let (code, message) = error

A. Yes

B. No

3. Given the following tuple:

let error = (101, "Invalid value.")

Which of the following accesses the second element of the tuple that is a String?

A. error.0

B. error.1

C. error[0]

D. error[1]

E. error.String

4. Given the following tuple:

let error = (errorCode: 201, message: "Invalid value.")

Which of the following can be used to access the second element ("Invalid value.") of the tuple?

A. error[1]

B. error["message"]

C. error{"message"}

D. error.message

E. errorMessage

5. Given:

var name: String? = "Dale"

Which of the following is a safe way to test if name has a value and unwrap the value and make it available as a temporary constant if it does?

A. name!

B. if let name = name { // code }

C. if name? { // code }

D. if name { // code }

Explanation / Answer

Please feel free to ask for any explanation needed regarding the answers.

Answers:

1. B

2. A

3. B

4. D

5. A

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