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Swift Tests

    • 20 tests |
    • 276 questions

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Sample Swift Assessments question Test your knowledge!

Which of the following Swift variables is an implicitly unwrapped optional variable and is correctly represented?

  • var myString: String!
  • let myString: String?
  • var myString: String?
  • let myString: String!

In the Swift programming language, which statement correctly initializes an optional string that may contain a value or may be nil?

  • let myString: String?
  • let myString: Optional = String()
  • let myString: String! = 'Optional'
  • var myString: String = nil
  • let my2string = String(optional)

Given an array of integers, which piece of Swift code utilises the map function to create a new array containing only the even numbers?

  • let evenNumbers = array.map { $0 % 2 == 0 ? $0 : nil }
  • let evenNumbers = array.filter { $0 % 2 }.map { $0 * 2 }
  • let evenNumbers = array.map { $0 * 2 }
  • let evenNumbers = array.filter { $0 % 2 == 0 }
  • let evenNumbers = array.map { Int($0 / 2) * 2 }

What will be the output when the following Swift code is executed? `var number = 5; repeat { number -= 1 } while number > 10`

  • The code will not compile.
  • The code will execute indefinitely.
  • The value of number will be 5.
  • The value of number will be 4.
  • The code will throw a runtime error.

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

  • To prevent code from executing if a condition is false.
  • To execute a block of code after a function returns.
  • To bind a value and ensure it satisfies a condition or exit the current scope.
  • To provide a default value for a variable.
  • To delay execution of code until all conditions are met.

When defining an enum in Swift, what is the behavior of the 'rawValue' property?

  • It returns a string representation of the enum case.
  • It is used to serialize the enum for networking.
  • It provides the underlying value of the enum case, if one is defined.
  • It generates a hash value for the enum.
  • It determines the memory address of the enum case.

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Swift Assessments Tips

1Get Familiar with Swift Standards

Understanding the Swift API design guidelines is crucial for writing idiomatic code that mirrors industry standards.

2Embrace Swift Playgrounds

Use Playgrounds to experiment with Swift’s features in a low-stakes environment where you can test and iterate quickly.

3Know Your Algorithms

Studying common algorithms and data structures will prepare you for solving complex problems during the test.

4Practice on Practice Aptitude Tests

Practice makes perfect. Head over to Practice Aptitude Tests to take free practice tests and sharpen those Swift skills before the big day.

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Swift Assessments FAQs

What is covered in these tests?

In these tests, expect to encounter a diverse array of Swift-related questions, from language syntax to implementing sophisticated features like concurrency and delegates. They are designed to evaluate practical coding ability and theoretical knowledge.

How do I prepare for Swift tests?

To prepare for Swift tests, immerse yourself in the Swift documentation, get hands-on by building small projects, and understand the latest features and best practices. Regularly practice coding and problem-solving.

Will these tests help me find a job?

Yes, these tests can enhance your job candidacy. A solid performance showcases your technical prowess to potential employers, indicating that you are well-versed in Swift and ready for professional challenges.

How do employers use these tests?

Employers utilize these Swift tests to gauge a candidate’s programming skills and problem-solving abilities. A good score indicates a strong command of Swift and readiness to handle real-world development tasks.

Where can I practice free Swift test questions?

The best way to prepare is by practicing, and you can find a wealth of free Swift practice test questions on Practice Aptitude Tests. Familiarizing yourself with the test format and question types is a strategic move.