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Swift Questions Set 2:

Quiz Mode

Does swift provide the programmers with generics ?

0: For yes 1: For no.

Solution:

What is the keyword used to declare protocols in Swift?

protocols

protocol

@protocol

None of the above

Solution:

What is the keyword used to declare unowned references in Swift?

weak

@unowned

No keyword is used

unowned

Solution:

Where are opaque types most commonly used?

Both of the above

None of the above

Optional chaining

Function return types

Solution:

What are type methods in Swift?

Methods that are called on instances

Methods that are called on the types

Both of the above

None of the above

Solution:

What happens if a programmer tries to access an unowned reference whose instance has been deallocated?

Depends on the compiler

None of the above

Compile-time error

Runtime error

Solution:

What will be the output of the following Swift code?

`struct SomeStruct {`

`static let mult = 8`

`static subscript(i: Int, j: Int) -> Int {`

`return mult * i * j`

`}`

`}`

`print(SomeStruct[8, 8])`

512

Error

None of the above

Solution:

What integer data types are available in Swift?

Signed 8-bit, 16-bit, 32-bit, and 64-bit integers

Unsigned 8-bit, 16-bit, 32-bit, and 64-bit integers

Both signed and unsigned 8-bit, 16-bit, 32-bit, and 64-bit integers

None of the above

Solution:

When does Automatic Reference Counting (ARC) deallocate memory given to an instance in Swift?

When no piece of code is still referencing the instance

Either of the above, depending on the situation

None of the above

When the deinitializer is called manually

Swift Questions Set 2:

Does swift provide the programmers with generics ?

Solution:

What is the keyword used to declare protocols in Swift?

Solution:

What is the keyword used to declare unowned references in Swift?

Solution:

Where are opaque types most commonly used?

Solution:

What are type methods in Swift?

Solution:

What happens if a programmer tries to access an unowned reference whose instance has been deallocated?

Solution:

What will be the output of the following Swift code?

`struct SomeStruct {`

`static let mult = 8`

`static subscript(i: Int, j: Int) -> Int {`

`return mult * i * j`

`}`

`}`

`print(SomeStruct[8, 8])`

Solution:

What integer data types are available in Swift?

Solution:

When does Automatic Reference Counting (ARC) deallocate memory given to an instance in Swift?

Solution:

Related Question Sets:

Related Topics:

Swift Questions Set 2:

Does swift provide the programmers with generics ?

Solution:

What is the keyword used to declare protocols in Swift?

Solution:

What is the keyword used to declare unowned references in Swift?

Solution:

Where are opaque types most commonly used?

Solution:

What are type methods in Swift?

Solution:

What happens if a programmer tries to access an unowned reference whose instance has been deallocated?

Solution:

What will be the output of the following Swift code? struct SomeStruct { static let mult = 8 static subscript(i: Int, j: Int) -> Int { return mult * i * j } } print(SomeStruct[8, 8])

Solution:

What integer data types are available in Swift?

Solution:

When does Automatic Reference Counting (ARC) deallocate memory given to an instance in Swift?

Solution:

Related Question Sets:

Related Topics:

What will be the output of the following Swift code?

`struct SomeStruct {`

`static let mult = 8`

`static subscript(i: Int, j: Int) -> Int {`

`return mult * i * j`

`}`

`}`

`print(SomeStruct[8, 8])`