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The term ___________ is used for a depth-first search that chooses values for one variable at a time and returns when a variable has no legal values left to assign.

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The term ___________ is used for a depth-first search that chooses values for one variable at a time and returns when a variable has no legal values left to assign.

(a) Forward search

(b) Backtrack search

(c) Hill algorithm

(d) Reverse-Down-Hill search

This question was posed to me in an interview for internship.

Asked question is from Constraints Satisfaction Problems topic in division Problem Solving of Artificial Intelligence

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Right answer is (b) Backtrack search

Easiest explanation: Refer definition of backtracking algorithm.

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