Multiple choice technology databases

What is a feature of a row according to relational concepts?

  1. A row is one instance of all columns.

  2. Row sequence is specified.

  3. Duplicate rows are allowed in a table.

  4. Rows can have different formats.
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A Correct answer
Explanation

In relational model concepts, a row (tuple) is a single instance containing data for all defined columns (attributes). Relational tables do not have a defined row sequence, cannot contain duplicate rows, and enforce a uniform schema structure across all rows.

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