Download Aptitude Crack
img not found img not found

The Relational Model and Normalization - Technical MCQs

Q1:

Which of the following is a group of one or more attributes that uniquely identifies a row?

A Key

B Determinant

C Tuple

D Relation

ANS:A - Key

Key can be a single attribute as well as a combination of multiple attribute but must contain unique value & must not be null. A primary key with multiple attribute is known as composite primary key.