DataBase Management System RDBMS

• A Name
• B Street
• C Id
• D Department
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C

Answer: C

The attributes name, street, and department can repeat for some tuples. But the id attribute has to be unique.So it forms a primary key.

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A relational database management system (RDBMS) is a collection of programs and capabilities that enable IT teams and others to create, update, administer and otherwise interact with a relational database. Most commercial RDBMSes use Structured Query Language (SQL) to access the database, although SQL was invented after the initial development of the relational model and is not necessary for its use. This is the questions and answers section on "RDBMS" with an explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.