A Method Used to Gather Information About an Existing System

question 44

Multiple Choice

A method used to gather information about an existing system is to make a model of it.There are several approaches to modeling in systems analysis.Logical modeling

• A)comes only after a physical model of the existing system is created.
• B)describes how a system should work,rather than how it actually works.
• C)illustrates how a system functions by describing the flow of documents and computer processes.
• D)illustrates what is being done,regardless of how that flow is actually accomplished.

---

Definitions:

Transition State

A high-energy, temporary state in a chemical reaction where reactants are converted into products.

Hydrogen Abstraction

A chemical reaction where a hydrogen atom is removed from a molecule by another atom or molecule.

Termination Step

The final step in a chemical reaction sequence that produces stable products from reactive intermediates, thus concluding the reaction.

Free Radical Chlorination

A chemical reaction in which chlorine atoms are added to a molecule via free radical mechanisms, often used for the halogenation of alkanes.