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Swift Questions Set 10:

Quiz Mode

How many access levels does Swift provide?

Solution:

What is the data type that is used to represent buttons in iOS?

Button

UIB

UIButton

None of the above

Solution:

What is the implicit property that every instance has with itself?

this

self

both of the above

None of the above

Solution:

Which of the following is a valid delegation in Swift?

Both of the above

None of the above

init! to init?

init? to init!

Solution:

What kind of initializers often fail in instantiating an object in Swift?

Designated

Convenience

Both of the above

Failable

Solution:

For how many maximum number of elements in a tuple does the Swift standard library provide the implementation of comparison operators?

Solution:

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

`enum Test: Int {`

`case a = 1, b = 2`

`}`

`var test = Test(rawValue: 2)`

`print(test!)`

No output

Solution:

Will the following lines of code cause an error ?

`func test(label: String){`

`label="String"`

`}`

`test(label: “String")`

`Options are :`

`1: For No 0: For yes`

Solution:

Which is the correct way to force unwrap optionals in Swift?

Consider the optional variable:

`var test: Int? = 5`

var fromTest = test!

var fromTest = !test

var formTest = forceUnwrap(test)

var fromTest = test.forceUnwrap()

Swift Questions Set 10:

How many access levels does Swift provide?

Solution:

What is the data type that is used to represent buttons in iOS?

Solution:

What is the implicit property that every instance has with itself?

Solution:

Which of the following is a valid delegation in Swift?

Solution:

What kind of initializers often fail in instantiating an object in Swift?

Solution:

For how many maximum number of elements in a tuple does the Swift standard library provide the implementation of comparison operators?

Solution:

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

`enum Test: Int {`

`case a = 1, b = 2`

`}`

`var test = Test(rawValue: 2)`

`print(test!)`

Solution:

Will the following lines of code cause an error ?

`func test(label: String){`

`label="String"`

`}`

`test(label: “String")`

`Options are :`

`1: For No 0: For yes`

Solution:

Which is the correct way to force unwrap optionals in Swift?

Consider the optional variable:

`var test: Int? = 5`

Solution:

Related Question Sets:

Related Topics:

Swift Questions Set 10:

How many access levels does Swift provide?

Solution:

What is the data type that is used to represent buttons in iOS?

Solution:

What is the implicit property that every instance has with itself?

Solution:

Which of the following is a valid delegation in Swift?

Solution:

What kind of initializers often fail in instantiating an object in Swift?

Solution:

For how many maximum number of elements in a tuple does the Swift standard library provide the implementation of comparison operators?

Solution:

What will be the output of the following lines of code? enum Test: Int { case a = 1, b = 2 } var test = Test(rawValue: 2) print(test!)

Solution:

Will the following lines of code cause an error ? func test(label: String){ label="String" } test(label: “String") Options are : 1: For No 0: For yes

Solution:

Which is the correct way to force unwrap optionals in Swift? Consider the optional variable: var test: Int? = 5

Solution:

Related Question Sets:

Related Topics:

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

`enum Test: Int {`

`case a = 1, b = 2`

`}`

`var test = Test(rawValue: 2)`

`print(test!)`

Will the following lines of code cause an error ?

`func test(label: String){`

`label="String"`

`}`

`test(label: “String")`

`Options are :`

`1: For No 0: For yes`

Which is the correct way to force unwrap optionals in Swift?

Consider the optional variable:

`var test: Int? = 5`