In Creating a Database, a System Analyst Creates Several Entities

question 47

Multiple Choice

In creating a database, a system analyst creates several entities and for each of the entity creates a list of attributes.For each attribute, the system analyst is given certain constraints as to the valid values that can be used.What is the term used to refer to these constraints?

• A)restrictions
• B)domains
• C)exceptions
• D)lists

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Definitions:

Decomposition Reaction

A chemical process where a lone compound decomposes into multiple, less complex materials.

Activation Energy

Activation energy is the minimum quantity of energy that a chemical species must possess in order to undergo a specified reaction.

Kinetic Energy

The energy that an object possesses due to its motion.

Mechanical Energy

The sum of potential energy and kinetic energy in a physical system, representing the ability to do work.