Explain the purpose of testing. Describe the many layers of testing that the system undergoes, including stub testing, unit testing, integration testing, system testing, parallel testing, and user acceptability testing.

_______________ is a process for testing skills and knowledge; successful completion of a certification exam results in an endorsement by the certifying authority that an individual is capable of performing particular tasks or jobs.

_____ software performs functions specific to a business or industry.

(Data processing) a. A national medical testing laboratory wants a new computer system to analyze its test results. The system must be capable of processing each day’s results as well as retrieving and outputting a printed report of all results meeting certain criteria, such as all results for a particular doctor or for hospitals in a certain state. Determine three or four major program units into which this system could be separated. (Hint: One possible program unit is “Prepare Daily Results” to create each day’s reports.) b. Suppose someone enters incorrect data for a test result, and the error is discovered after the system has entered and stored the data. What program unit is needed to correct this problem? Discuss why such a program unit might or might not be required by most systems. c. A program unit has been developed that allows users to change data that has been entered and stored incorrectly. Discuss the need for including an “audit trail” that would allow reconstructing the changes later as well as when they were made and who made them.

_______ is a form of testing that involves linking all of the individual components together and testing them as a group to uncover any defects between individual components. a. Unit testing b. System testing c. Integration testing d. Volume testing