What is the purpose of the required keyword in Swift?

Question

In a “initializer” of a class in Swift, what does the convenience keyword allow? (convenience init)

Accepted Answer

to restrict the call to a constructor specific to the current class

Accepted Answer

to avoid calling the parent constructor within the init

Accepted Answer

to make it mandatory to call a constructor of the current class

Answer

to call the parent constructor via super

Answer

to restrict the call to a constructor specific to the parent class

Question from the Swift test