Higher-order function foldr: (X Y --> Y) Y ListOfX --> Y Which of the below is true? (select two) A) X and Y must be of different types B) X and Y must be of the same type C) The return type of foldr is a function that takes two arguments D) foldr takes a function as an input argument E) Y can't be a list F) The base case of the implicit recursion is of type Y

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Higher-order function foldr: (X Y --> Y) Y ListOfX --> Y

Which of the below is true? (select two)

A) X and Y must be of different types

B) X and Y must be of the same type

C) The return type of foldr is a function that takes two arguments

D) foldr takes a function as an input argument

E) Y can't be a list

F) The base case of the implicit recursion is of type Y

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Higher-order function foldr: (X Y --> Y) Y ListOfX --> Y

 

Option A And Option C is TRUE.

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