Which of the following indexes is automatically created by the database server when an object is created?

Which of the following indexes is automatically created by the database server when an object is created?

  1. a) Implicit
  2. b) Single column
  3. c) Unique
  4. d) Composite

From the Sonali & Janata Bank Assistant Database Administrator September 2021 – Preliminary (AUST) exam, question 55 of 93.

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