Why iOS development targets premium users in iOS Swift - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message about iOS users.

iOS Swift

print("iOS users are often [1] buyers.")

Drag options to blanks, or click blank then click option'

Apremium

Bbudget

Crandom

Dcasual

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'budget' because it sounds like a user type.

Selecting 'casual' which does not relate to spending.

iOS users are generally considered premium buyers because they tend to spend more on apps and services.

2fill in blank

medium

Complete the code to check if a user is premium.

iOS Swift

if user.spending > [1] {
  print("User is premium")
}

Drag options to blanks, or click blank then click option'

A10

B50

C100

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 0 or 10 which are too low to define premium users.

A spending threshold of 100 is used to identify premium users who spend more.

3fill in blank

hard

Fix the error in the code to identify premium users.

iOS Swift

let isPremium = user.spending [1] 100
if isPremium {
  print("Premium user")
}

Drag options to blanks, or click blank then click option'

A>=

B==

C<

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which only matches exactly 100.

Using '<' which is the opposite of what we want.

Using '>=' checks if spending is equal or greater than 100, correctly identifying premium users.

4fill in blank

hard

Fill both blanks to create a function that returns true for premium users.

iOS Swift

func isPremiumUser(spending: Int) -> Bool {
  return spending [1] [2]
}

Drag options to blanks, or click blank then click option'

A>=

B<=

C100

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' which would mark low spenders as premium.

Using 50 instead of 100 as the threshold.

The function returns true if spending is greater or equal to 100, marking premium users.

5fill in blank

hard

Fill all three blanks to create a dictionary filtering premium users.

iOS Swift

let premiumUsers = users.filter { $0.spending [1] [2] }.map { $0.[3] }

Drag options to blanks, or click blank then click option'

A>

B100

Cname

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' which filters low spenders.

Mapping to wrong property instead of 'name'.

We filter users spending more than 100 and map to their names to get premium user names.