Language Upgrades · interview question
Consider the following code snippet. What will be the result of compiling this code?
Multiple choiceHardchapter-12-curatedpremiumlanguage-upgradessealed-classes
sealed class Order permits OnlineOrder, StoreOrder {}
class ShopOrder extends Order {}Answer and explanation
Correct answer
B. Compilation error: Non-permitted subclass 'ShopOrder'.
Why
The class 'ShopOrder' is not listed in the 'permits' clause of the sealed class 'Order', leading to a compilation error as it violates the sealed class hierarchy.
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