Multiple choice technology

What is the Data type of Surrogate Key?

  1. Integer

  2. Binary

  3. Char

  4. Varchar
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A Correct answer
Explanation

Surrogate keys are typically implemented as integers (often auto-incrementing or sequence-generated) because they provide efficient storage, fast join performance, and carry no business meaning. They are not character-based like natural keys, nor binary like some system identifiers.

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