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      Question

      A data analyst frequently performs range queries (e.g.,

      "find all records where salary is between X and Y"). Which type of indexing is generally most effective for such queries?
      A Hash Index Correct Answer Incorrect Answer
      B Full-text Index Correct Answer Incorrect Answer
      C B-tree Index Correct Answer Incorrect Answer
      D Bitmap Index Correct Answer Incorrect Answer
      E Spatial Index Correct Answer Incorrect Answer

      Solution

      B-tree indexes maintain data in sorted order, which allows for very efficient retrieval of data within a specified range. Hash indexes, in contrast, do not preserve order.

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