Refined Swift Test - 72+ MCQs: Swift Programming Language Quiz: Test Your Swift Skills

1. Which operator is used for equality comparison in Swift?

2. What is the purpose of an optional in Swift?

To handle errors

To define a default value

To represent a value that may or may not be present

To declare a constant value

3. What is the purpose of Swift's 'Any' and 'AnyObject' types?

To represent any value in Swift

To declare a constant in Swift

To define a new Swift type

Swift does not have 'Any' and 'AnyObject' types

4. In Swift, how do you declare a custom error type conforming to 'Error' protocol?

class MyError: Error { }

typealias MyError = Error

error MyError: Error { }

protocol MyError: Error { }

5. Which keyword is used to declare a constant in Swift?

let

var

const

static

6. How do you declare a property as 'weak' in Swift?

weak var myProperty: Type?

myProperty weak Type?

let myProperty: weak Type?

var myProperty: weak Type?

7. How can you achieve multithreading in Swift?

By using global variables

Swift does not support multithreading

Through the use of DispatchQueue

By defining multiple classes

8. Explain Swift's 'associatedtype' in protocols.

A keyword for defining Swift functions in protocols

A mechanism for specifying the type of an associated value in Swift

An alternative syntax for defining Swift properties

A way to declare global constants in Swift

9. What is the purpose of the Swift 'guard' statement?

To declare a constant in Swift

To create a guardrail in Swift code

To define a Swift function

To enforce early exit in Swift based on a condition

10. What is the purpose of the 'if' statement in Swift?

To create a loop

To define a function

To make decisions based on conditions

To import external libraries

Swift MCQ Test 5