Vector Indexes

1. What is the main disadvantage of brute-force nearest-neighbor search?

It is guaranteed to miss true neighbors It requires a complex indexing system It scans every vector on every query It is slower than approximate methods

2. Which of the following is a characteristic of Approximate Nearest Neighbor (ANN) indexes?

They guarantee perfect accuracy They primarily use brute-force searches They trade some accuracy for speed They do not require any tuning

3. What is the primary benefit of using an ANN index over brute-force search in large corpora?

Increased memory usage availability Guaranteed recall of true neighbors Faster query responses Lower cost in terms of hardware

4. According to the lesson, when should one consider switching from exact search to an ANN index?

When data volume is low When latency at real data volume demands it When the corpus is under a thousand vectors When memory costs are low

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