Compress Index performs which action?

• A. Deactivates the index from the search menu.
• B. Rebuilds the index fully.
• C. Updates the index after documents change.
• D. Compresses the index to zero fragmentation.

Answer: (D)

Index optimization is about keeping the search index efficient by reducing fragmentation. Over time, as documents are added and removed, the index gets split into many small, scattered segments. Compressing the index reorganizes these segments, merges where possible, and applies compression to the postings data. This reduces fragmentation, improves query speed, and saves space. It is different from deactivating the index, which would disable search, or from updating after changes (that’s incremental indexing), or from rebuilding the index from scratch (which restarts the entire indexing process). So, Compress Index performs an action aimed at compressing the index to reduce fragmentation.