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

1. 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

2. How does Swift handle optionals and unwrapping?

Optionals in Swift are automatically unwrapped

By using the 'try' keyword

Through forced unwrapping using '!'

Swift does not have optionals

3. What is the correct syntax for an 'if-else' statement in Swift?

if condition { } else { }

if { } else { }

if (condition) { } else { }

if-else condition { }

4. Which Swift keyword is used to indicate the absence of a value?

nil

void

none

empty

5. What is the purpose of the 'guard' statement in Swift?

To declare a constant

To create a loop

To check for nil and else execute the code

To define a function

6. What is the correct way to check if two strings are not equal in Swift?

string1 <> string2

string1 != string2

string1 ~= string2

string1 .notEqual(string2)

7. Explain the concept of 'optionals' in Swift and how they are used.

Swift's version of nullable types, indicating that a variable may contain a nil value

An alternative syntax for functions in Swift

A way to create generic types in Swift

A Swift keyword for handling loops

8. Explain the concept of Swift's 'Set' type.

A way to represent a collection of unique, unordered values

A mechanism for defining custom attributes in Swift

A feature for writing concurrent code in Swift

Swift does not have a 'Set' type

9. Explain the use of Swift's 'lazy' keyword.

To define variables that cannot be modified

To create computed properties in Swift

To delay the initialization of a property until it is accessed

To restrict access to a Swift property

10. In Swift, what is the purpose of the 'guard' statement?

To unwrap optionals

To check for nil and else execute the code

To force unwrap optionals

To provide a default value for optionals

Swift MCQ Test 5