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What is one of the main characteristics of Swift that makes it stand out from other programming languages?

• It is primarily used for data analysis.

• It is designed for web development.

• It is known for its safety and performance.

• It is a dynamically typed language.

Which of the following is a correct way to declare a variable in Swift?

• String name = "John"

• var name: String = 'John'

• let name = 'John'

• var name = "John"

In Swift, what is the purpose of using 'let' instead of 'var'?

• To declare a variable that can change type.

• To declare a constant value.

• To declare a variable with a large size.

• To declare a variable with a default value.

What is an optional in Swift?

• A variable that can change its type.

• A function that can be called optionally.

• A loop that can be skipped.

• A type that can hold a value or no value at all.

How does Swift handle errors in code?

• By using try-catch blocks.

• By using error codes.

• By using optionals.

• By using error handling protocols.