Cis correct — UiPath’sContext Groundingsystem usescosine similarity searchto retrieve the most relevant documents, passages, or semantic chunks from indexed data during runtime.

This retrieval process is critical for:

Minimizing hallucination

Enhancingprompt grounding

Connecting agents toreal-time enterprise knowledge

Here’s how it works:

All documents areembedded into vector spaceusing a model (e.g., OpenAI or Azure OpenAI embeddings)

At runtime, the agent’s query isconverted into a vector

Acosine similaritycomparison is used to fetch themost semantically similar documentsbased onangle (not magnitude)between vectors

This enables agents to provideaccurate, contextual answers, like referencing HR policies or IT guides.

Other options:

A (Softmax) is a classifier, not a search method

B (Sigmoid) is for binary classification

D (ReLU) is an activation function in neural nets — not for search