Which operation creates a full rebuild of the index?

• A. Build Index: Incremental
• B. Build Index: Full
• C. Swap Index
• D. Stop words

Answer: (B)

A full rebuild reprocesses every document and recreates the entire index from scratch using the current settings, so all terms, positions, and metadata are rebuilt. This is what happens with the operation that creates a full rebuild: it goes through all content again, ensuring the index is completely up to date with any changes in analyzers, tokenization, or mappings, and it’s often necessary after large changes or data inconsistencies. It’s slower and more resource-intensive because nothing is assumed from the previous index state.

In contrast, an incremental rebuild only processes items that have changed since the last indexing, so it’s faster but can miss deletions or other changes that require a full rebuild. Swap Index doesn’t perform a rebuild at all; it merely switches which index is active. Stop words isn’t an indexing operation—it's a list of common words that are ignored during indexing.