Native mobile development

What is Swift?

• A programming language developed by Microsoft.

• A tool used to design user interfaces.

• A powerful and intuitive programming language by Apple.

• A library for handling backend databases.

What is the purpose of an optional in Swift?

• To perform mathematical calculations.

• To represent a value that can either exist or be nil.

• To create loops for repetitive tasks.

• To handle errors in Swift programs.

Which of the following is a valid declaration of an optional?

• let name = "John"

• var score = Int!

• var userName: String? = nil

• let pi = 3.14

What will this code print?

• "It's hot outside!"

• "It's cold."

• An error message

• Nothing

How do you declare a constant in Swift?

• Using var keyword

• Using const keyword

• Using let keyword

• Using final keyword

Which logical operator ensures BOTH conditions are true?

• &&

• ||

• !

• ==

What will this loop print?

• 1 2 3 4

• 1 2 4

• 1 2

• 1 4

What is the output of this code?

• 0 1 2

• 3 2 1

• 3 3 3

• Infinite loop

The __________ loop checks the condition before executing the code, whereas the repeat-while loop executes the code at least once before checking the condition.

The IDE used for developing iOS applications is called __________.