Failure in which of the following testing stages would have the GREATEST impact on the implementation of
new application software?

A.
System testing

B.
Acceptance testing

C.
Integration testing

D.
Unit testing

Explanation:
Acceptance testing is the final stage before the software is installed and is available for use. The greatest
impact would occur if the software fails at the acceptance testing level, as this could result in delays and cost
overruns. System testing is undertaken by the developer team to determine if the software meets user
requirements per specifications. Integration testing examines the units/modules as one integrated system and
unit testing examines the individual units or components of the software. System, integration and unit testing
are all performed by the developers at various stages of development; the impact of failure is comparatively
less for each than failure at the acceptance testing stage.