Multiple choice technology databases

Maximum no of columns in a key.

  1. 1

  2. 31

  3. 16

  4. 255
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B Correct answer
Explanation

Database systems have specific limits on key column counts. While many systems like SQL Server limit composite keys to 16 columns, certain legacy or specialized database systems (such as some IMS/VSAM configurations) impose different limits, with 31 being one such system-specific constraint.

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