Multiple choice technology databases

What is an index?

  1. An index is the same as alias.

  2. An index is a special way to join 2 or more tables.

  3. An index is a database table attribute, which speeds-up data search within a table.

  4. None of the above
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C Correct answer
Explanation

An index is a database structure associated with a table attribute that improves the speed of data retrieval operations. It does not replace aliases or define table joins.

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