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[2020] COMPSCI 367 Artificial Intelligence - Final Exam - Question 11 A* Search Algorithm

[2020] COMPSCI 367 Artificial Intelligence - Final Exam - Question 11 A* Search Algorithm

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THE UNIVERSITY OF AUCKLAND CourseNana.COM

SEMESTER TWO 2020 Campus: City CourseNana.COM

COMPUTER SCIENCE Artificial Intelligence CourseNana.COM

(Time Allowed: TWO hours) CourseNana.COM

This exam is out of 100 marks.
Attempt ALL questions.
Write your answers in the space provided in this booklet. There is space at the back for answers that overflow the allotted space.
The use of calculators is NOT permitted. CourseNana.COM

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PART B: Mike Barley’s material CourseNana.COM

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Question 11 CourseNana.COM

Given a problem, P, in a unit-cost domain, where the forward and backward average branching factor is b, the optimal solution cost for P is d, and an admissible and consistent heuristic h, with an average value of x. For the sub-questions below, please specify a formula. CourseNana.COM

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(A) Approximately how many nodes will be expanded by A* using h? CourseNana.COM

(B) Approximately how many nodes will be expanded by a blind bidirectional search algorithm? CourseNana.COM

(C) Under what conditions will A* expand fewer nodes than the blind bidirectional search algorithm? CourseNana.COM

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