Strings in Swift

Which property of the string is used get number of characters?

• length

• length()

• count

• count()

which method/methods is/are used to find the substrings in a given string?

• hasPrefix()

• contains()

• prefix(n)

• getChars(n)

We can have an empty character

• True

• False

let name = "Ethan Hunt"

print(name.first)

output is ?

• E

• Ethan

• optional(E)

• compiler error

let pokemon = "poke\u{0301}mon"

print(Pokemon.count)

output is ?

• 7

• 8

• 14

• none

let kid = "Miles Morales"

print(kid[kid.index(kid.startIndex, offsetBy:3)]

output is ?

• e

• Optional(e)

• l

• optional(l)

let scarlet = "Wanda Maximoff"

print(scarlet.substring(to:scarlet.firstIndex(of:" ")!)

output is :

• Wanda

• W

• Maximoff

• Compiler Error

let strt1 = "liril"

let str2 = str1.reversed()

if str1 == str2 {

print("palindrome")

} else {

print("not a palindrome")

}

• not a palindrome

• palindrome

• compiler error

What is the output of ?

let name = "TESSERACT"

print(name.min()!)

• optional(A)

• A

• tesseract

• compiler error

let a = 10

let b = 20

let c = 30

let result = "Solve for c. 30 = \(a)x + \(b)"

output is ?

• Solve for 30. 30 = 10x + 20

• Solve for c. 30 = 10x + 20

• Solve for c. 30 = \1030 + 20

• error