engineering computer science MCQ #786

What is the primary key in a relational database?

engineering computer science MCQ #786

  1. Question 1

    Q1. What is the primary key in a relational database?

    • A) A unique identifier for each tuple
    • B) A foreign key referencing another table
    • C) A composite key with multiple attributes
    • D) A non-unique attribute for indexing

    Answer: A unique identifier for each tuple

    Explanation: Primary key uniquely identifies each tuple, ensuring data integrity and preventing duplicates.