Microsoft Azure Data Fundamentals DP-900 Practice Question

An index stores key values and row pointers in an ordered structure that the query optimizer can quickly search, reducing the I/O needed to locate requested rows. Views are virtual tables that hold no persisted structure, triggers run automatically in response to data-modification events, and stored procedures are reusable batches of T-SQL code. None of these alternatives provide the persisted, searchable ordering that an index supplies, so they do not speed data access in the same way.