engineering computer science MCQ #814

What is a composite key?

engineering computer science MCQ #814

  1. Question 1

    Q1. What is a composite key?

    • A) A single column that uniquely identifies a row
    • B) A combination of two or more columns that uniquely identify a row
    • C) A foreign key
    • D) A primary key

    Answer: A combination of two or more columns that uniquely identify a row

    Explanation: A composite key is a combination of two or more columns that uniquely identify a row, used when a single column is not sufficient to identify a row.