Pathway

Which keyword is used to declare a constant in Swift?

• let

• var

• const

In Swift, can the value of a constant be changed after it has been declared?

• True

• False

Which Swift data type is used to represent a sequence of characters?

• String

• Character

• Array

• Set

Which property can be used to get the number of characters in a string in Swift?

• count

• length

• size

• sizeOf

How can we write a single-line comment in Swift?

• <!-- This is a comment -->

• /* This is a comment */

• // This is a comment

• # This is a comment

What is readLine() used for in Swift?

• To read a text file

• To read user input from the command line

• To read data from a URL

• To read an array

In Swift, what does the ! symbol mean when placed after a variable?

• It declares a new Optional variable

• It increments the value of a variable

• It implicitly unwraps an Optional variable

• It indicates a factorial operation

How do you create an array of integers in Swift?

• var array = [Integer]()

• var array: [int] = []

• var array: [Int] = []

• var array = []

What is the difference between information and data?

• Data is raw facts, while information is processed and meaningful data

• Information is processed data, while data is raw facts

• Information is more valuable than data

• There is no difference

How do you declare a constant in Swift?

• let name = "John"

• const name = "John"

• var name = "John"

• constant name = "John"