Data Control Analyst MOD 2019 Paper of NTS

Here is the complete solved Past Paper of Data Control Analyst Ministry of Defence MOD conducted by NTS in 2019.

What is a Composite Key in Database?

A. Set of one or more attribute that can be used to uniquely identify the records in a table.

B. The minimal set of attributes that uniquely identifies each occurrence of an entity type.

C. The candidate key that is selected to uniquely identity each, occurrence of an entity type.

D. A candidate key that consists of two or more attribute.