How Well Do You Know Swift?

How Well Do You Know Swift?

Test your knowledge of the Swift programming language with this quiz. Answer 12 questions and see how much you've learned.

published on September 07, 2023
1/12

Which of the following is an advantage of using Swift over Objective-C?

Which of the following is an advantage of using Swift over Objective-C?
Faster performance
Easier syntax
Better memory management
More extensive libraries
2/12

What is the keyword used to define a constant in Swift?

What is the keyword used to define a constant in Swift?
let
var
const
final
3/12

Which of the following is not a primitive data type in Swift?

Which of the following is not a primitive data type in Swift?
Int
Double
Character
Bool
4/12

What is an optional in Swift?

What is an optional in Swift?
A type of loop
A type of function
A variable that may or may not have a value
A type of data structure
5/12

Which Swift keyword is used to indicate a function that doesn't return a value?

Which Swift keyword is used to indicate a function that doesn't return a value?
void
Void
none
nil
6/12

What does the 'guard' statement do in Swift?

What does the 'guard' statement do in Swift?
Creates a loop
Performs early exit from a block of code
Defines a constant
Implements error handling
7/12

What is a protocol in Swift?

A blueprint for methods, properties, and other requirements that an adopting type must provide
A type of data structure
A keyword used to define enums
An alternative to classes for object-oriented programming
8/12

Which operator is used for concatenating strings in Swift?

+
,
-
+=
9/12

Which keyword is used to declare a function in Swift?

Which keyword is used to declare a function in Swift?
initialize
create
func
10/12

What does the 'self' keyword refer to in Swift?

What does the 'self' keyword refer to in Swift?
The current instance of a class or structure
A reserved keyword
A reference to an external object
A type of loop
11/12

Which control flow statement is used for iterating over a sequence, like an array, in Swift?

Which control flow statement is used for iterating over a sequence, like an array, in Swift?
if-else
switch
for
for-in
12/12

What is a closure in Swift?

What is a closure in Swift?
A self-contained block of functionality that can be passed around and used in your code
A type of loop
A class specialization
An alternative to functions