Which solution has the lowest path cost?
Which solution has the lowest path cost?
Solution quality is measured by the path cost function, and an optimal solution has the lowest path cost among all solutions.
What is best first search technique?
Best first search is a traversal technique that decides which node is to be visited next by checking which node is the most promising one and then check it. For this it uses an evaluation function to decide the traversal.
Will A * always find lowest cost path?
If the heuristic function is admissible, meaning that it never overestimates the actual cost to get to the goal, A* is guaranteed to return a least-cost path from start to goal.
Which of the function will select the lowest expansion node at first for evaluation?
Which function will select the lowest expansion node at first for evaluation? Explanation: The lowest expansion node is selected because the evaluation measures distance to the goal. 5. What is the heuristic function of greedy best-first search?
Which search expand the node n with the lowest path cost?
Uniform-cost search
Explanation: Breadth-first search is optimal when all step costs are equal, because it always expands the shallowest unexpanded node. If the solution exists in shallowest node no irrelevant nodes are expanded. Explanation: Uniform-cost search expands the node n with the lowest path cost.
Which cost we need to consider for best first search?
In the best first search algorithm, we expand the node which is closest to the goal node and the closest cost is estimated by heuristic function, i.e. f(n)= g(n).
What is the cost function of best first search?
Most widely-known form of best-first search. It evaluates nodes by combining g(n), the cost to reach the node, and h(n), the cost to get from the node to the goal: f(n) = g(n) + h(n) (estimated cost of cheapest solution through n).
Does a * Give the shortest path?
It’s a little unusual in that heuristic approaches usually give you an approximate way to solve problems without guaranteeing that you get the best answer. However, A* is built on top of the heuristic, and although the heuristic itself does not give you a guarantee, A* can guarantee a shortest path.
WHY A * is admissible?
A* is admissible if it uses an admissible heuristic, and h(goal) = 0. (h(n) is smaller than h*(n)), then A* is guaranteed to find an optimal solution. i.e., f(n) is non-decreasing along any path. Theorem: If h(n) is consistent, f along any path is non-decreasing.
What is the other name of the greedy best-first search?
Pure Heuristic Search
What is the other name of the greedy best first search? Explanation: The greedy best first search algorithm was used to predict the closeness of the end of the path and its solution by some of the computer scientists. It is also known as Pure Heuristic Search.
Which search is implemented with an empty first in first out queue?
Discussion Forum
| Que. | Which search is implemented with an empty first-in-first-out queue? |
|---|---|
| b. | Breadth-first search |
| c. | Bidirectional search |
| d. | None of the mentioned |
| Answer:Breadth-first search |
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