Ad hoc Something that is ad hoc or that is done on an ad hoc basis happens or is done only when the situation makes it necessary or desirable, rather than being arranged in advance or being part of a general plan. Ad hoc testing Testing carried out using no recognized test case design technique. Ad-lib test (also ad hoc test), a test executed without prior planning; especially if the expected test outcome is not predicted beforehand. an undocumented test. Anomaly An anomaly is a rule or practice that is different from what is normal or usual, and which is therefore unsatisfactory. Anything observed in the documentation or operation of software that deviates from expectations based on previously verified software products or reference documents. Attack An attempt to bypass security controls on a computer. The attack may alter, release, or deny data. Whether an attack will succeed depends on the vulnerability of the computer system and the effectiveness of existing count...