Prolog: We are writing bst_member/2, a relation between an integer and a binary search tree containing that integer. bst_member (X, bin(L, X, R)). bst_member (X, bin(L, Y, R)) :- X #< Y, bst_member(X, L). bst_member (X, bin(L, Y, R)) :- X #> Y, bst_member (X, R). Ignoring behavior when the second argument is not a BST, is this definition correct? O No, we have not specified how to handle the empty tree O No, we have not specified what to do when the integer is not present Yes, but it will only terminate when both arguments are fully instantiated O Yes, but it will only terminate when the second argument is structurally instantiated O All of the above O None of the above O I don't know
Prolog: We are writing bst_member/2, a relation between an integer and a binary search tree containing that integer. bst_member (X, bin(L, X, R)). bst_member (X, bin(L, Y, R)) :- X #< Y, bst_member(X, L). bst_member (X, bin(L, Y, R)) :- X #> Y, bst_member (X, R). Ignoring behavior when the second argument is not a BST, is this definition correct? O No, we have not specified how to handle the empty tree O No, we have not specified what to do when the integer is not present Yes, but it will only terminate when both arguments are fully instantiated O Yes, but it will only terminate when the second argument is structurally instantiated O All of the above O None of the above O I don't know
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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
Transcribed Image Text:Prolog: We are writing bst_member/2, a relation between an integer and a binary search tree containing that integer.
bst_member(X, bin(L, X, R)).
bst_member(X, bin(L, Y, R)) :- X #< Y, bst_member(X, L).
bst_member (X, bin(L, Y, R)) :- X #> Y, bst_member(X, R).
Ignoring behavior when the second argument is not a BST, is this definition correct?
O No, we have not specified how to handle the empty tree
O No, we have not specified what to do when the integer is not present
O Yes, but it will only terminate when both arguments are fully instantiated
O Yes, but it will only terminate when the second argument is structurally instantiated
All of the above
None of the above
I don't know

Transcribed Image Text:Logic Programming: A unifier for two terms is a term that is an instance of both terms, meaning it can be obtained by substitution of variables.
Given two Prolog terms, foo(A, B) and bar(X, Y), select the term that is a unifier.
O foo(A, A)
O foo(X, Y)
O foobar(A, B, X, Y)
O foo(U, V)
O All of the above
O None of the above
O I don't know
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