Where can we use protocols as full-fledged types in Swift?

What is the correct sequence of steps involved in the process of initialization in Swift?

What kind of initializer delegation is allowed by Swift for reference types?

What will be the output of the following lines of code?

What is the external package manager used with Swift to install external Swift frameworks?

Which of the following are valid types of methods in Swift?

What kinds of storage type is a function label/argument ? 

Type the numbers in the text box for the correct answer

1: Variable 2: Constant

What is the correct method for updating values related to keys of dictionaries in Swift?

What are the additional features that classes have compared to structures in Swift?

What will be the output of the following code?

var airports: [String: String] = ["YYZ": "Toronto Pearson", "DUB": "Dublin"]

var string = String()

for airportCode in airports.keys {

  string.append(airportCode)

}

print(string)