# IDS Search Algorithm

EntrancedCrocus
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## 18 Questions

O(bd/2)

### Which of the following is a characteristic of the IDS algorithm?

It does not generate nodes at depth d+1

O(bd)

### How does the number of nodes generated by IDS compare to BFS for b=10 and d=5?

IDS generates fewer nodes than BFS

### What is the main advantage of IDS over BFS?

IDS is faster than BFS

### What is the optimality of the IDS algorithm?

YES, if path cost is a non-decreasing function of the depth of the node

O(bm)

### What is the optimal strategy for searching?

Uniform Cost Search

### Why may DFS not always give an optimal solution?

Because it expands the deepest node first

### What is the characteristic of Uniform Cost Search?

It only cares about the total cost

### What is the condition for Uniform Cost Search to be complete and optimal?

If the cost of each step exceeds some positive bound ε

### How does Uniform Cost Search queue nodes?

By the total cost from the root

### What is the main advantage of Iterative Deepening Search over Breadth-First Search?

Less memory usage

### What is the time complexity of Iterative Deepening Search?

Costly due to repeated generation of states

### How does Iterative Deepening Search achieve its efficiency?

By redoing some computations again and again

### What is the completeness of Iterative Deepening Search?

YES (no infinite paths)

### How does the number of nodes generated in Iterative Deepening Search change with depth?

According to the formula: d.b + (d-1).b2 + (d-2).b3 + ………………..+1

### What is the main difference between Iterative Deepening Search and Breadth-First Search?

Node generation strategy

Understand the time and space complexity of Iterative Deepening Search (IDS) algorithm and its optimality. Compare IDS with Breadth-First Search (BFS) algorithm.

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