As Part of a Nightly Testing Process, New Version of an Application

question 277

Multiple Choice

As part of a nightly testing process, new version of an application is deployed to the set of web servers in the development environment. Which of the following is the BEST way to ensure the test environment is consistent with the previous night's test?

• A) Clone the development web servers to the test environment.
• B) Reprovision the web servers using predefined templates.
• C) Undeploy the previous application and deploy the new version.
• D) Revert to a previous state using configuration management tools.

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Definitions:

Experimental Design

The process of planning a study to meet specified objectives and ensure that the results are statistically significant and replicable.

Independent Variable

The variable that is manipulated by the researcher to examine its effect on the dependent variable in an experiment.

External Validity

The extent to which the results of a study can be generalized to other situations and to other people.

Confounding Variable

A variable that influences both the dependent and independent variables in a study, potentially misleading the results if not controlled.