Data Processing Practice Tests – Relational Models and Constraints in Database

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Data Processing Practice Tests – Relational Models and Constraints in Database


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The computer language for storing, manipulating and retrieving data stored in a relational database is known as _______

A. machine language      B. programming language      C. Structured Query Language      D. C++


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


The _______ constraint ensures that all values in a column satisfy certain conditions.

A. NOT NULL      B. DEFAULT      C. UNIQUE      D. CHECK


Rules that ensures the accuracy and reliability of the data in the database are known as ______

A. SQL      B. Entities      C. Attributes      D. Constraints


The _______ constraint ensures that all values in a column are different.

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


 



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