Data Processing Practice Tests – Relational Models and Constraints in Database


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The data in RDBMS is store in database objects called _______

A. fields      B. records      C. tables      D. none of the above


The following are examples of modern database systems EXCEPT ________

A. Microsoft Excel      B. Oracle      C. Microsoft SQL Server      D. MySQL


Which of the integrity constraints states that every table must have a primary key and that the column or columns chosen to be the primary key should be unique and not null.

A. Entity integrity      B. Domain integrity      C. Referential integrity      D. none of the above


A _______ is designed to maintain specific information about every record in the table.

A. field      B. record      C. table      D. none of the above


The ______ constraint provides a default value for a column when none is specified

A. NOT NULL     B. DEFAULT      C. UNIQUE      D. none of the above


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